Registration of securities issued in business combination transactions

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Consolidating Condensed Statement of Operations (Detail)

v2.4.0.8
Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Consolidating Condensed Statement of Operations (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Condensed Financial Statements [Line Items]                            
Total revenues $ 237,762 $ 157,187 $ 165,301 $ 178,925 $ 176,569 $ 181,066 $ 176,589 $ 172,812 $ 156,179 $ 630,918 $ 520,795 $ 677,982 $ 686,646 $ 659,475
Operating expenses 153,741   101,484             414,336 300,942 414,064 418,144 471,278
Depreciation and amortization 35,882   29,779             97,674 85,357 113,017 112,136 115,030
Total operating gross margin 48,139 16,405 34,038 46,440 54,018 44,399 49,966 40,797 21,204 118,908 134,496 150,901 156,366 73,167
General and administration expense (14,188) [1]   (8,905) [1]             (49,449) [1] (21,822) [1] (46,052) (31,314) (30,728)
Impairment and other charges           (170,000)             (170,000)  
Provision for reduction in carrying value of certain assets                       0 (1,350) (1,952)
Gain on disposition of assets, net 1,094   606             2,759 2,466 1,974 3,659 4,620
Total operating income (loss) 35,045 (8,317) 25,739 40,388 49,013 (133,215) 41,959 33,215 15,402 72,218 115,140 106,823 (42,639) 45,107
Other income and (expense):                            
Interest expense (13,127)   (8,171)             (33,874) (25,133) (33,542) (22,594) (26,805)
Changes in fair value of derivative positions (5,218)   19             54 8 55 (110)  
Interest income 130   30             2,392 109 153 256 257
Changes in fair value of derivative positions (5,218)   (117)             (5,218) (1,766) (2,130)   (7,209)
Other 400   26             333 62 (382) (325) 155
Equity in net earnings of subsidiaries 0   0             0 0       
Total other expense (17,815)   (8,213)             (36,313) (26,720) (35,846) (22,773) (33,602)
Income (benefit) before income taxes 17,230   17,526             35,905 88,420 70,977 (65,412) 11,505
Income tax expense (benefit):                            
Current                       18,042 33,608 27,521
Deferred                   12,872 8,403 15,837 (48,375) (1,308)
Income tax expense (benefit) 9,112   6,695             18,841 31,155 33,879 (14,767) 26,213
Net income (loss) 8,118   10,831             17,064 57,265 37,098 (50,645) (14,708)
Less: Net (loss) attributable to noncontrolling interest 148   (105)             221 (146) (215) (194) (247)
Net income (loss) attributable to controlling interest 7,970 (20,098) 10,936 20,083 26,392 (90,176) 20,725 14,173 4,827 16,843 57,411 37,313 (50,451) (14,461)
Parent [Member]
                            
Condensed Financial Statements [Line Items]                            
Total revenues 0   0             0 0      
Operating expenses 0   0             0 0      
Depreciation and amortization 0   0             0 0      
Total operating gross margin 0   0             0 0      
General and administration expense (47) [1]   (47) [1]             (140) [1] (137) [1]   (218) (225)
Gain on disposition of assets, net 0   0             0 0      
Total operating income (loss) (47)   (47)             (140) (137)   (218) (225)
Other income and (expense):                            
Interest expense (14,035)   (9,105)             (36,734) (27,923)   (26,654) (30,771)
Changes in fair value of derivative positions (5,218)   19             54 8   (110)  
Interest income 360   95             3,366 8,695   18,131 42,000
Changes in fair value of derivative positions 0   (117)             (5,218) (1,766) (2,130)   (7,209)
Other (1)   0             0 0      
Equity in net earnings of subsidiaries 22,322   10,596             36,330 61,553 43,884 (23,484) (22,962)
Total other expense 3,428   1,488             (2,202) 40,567   (32,117) (18,942)
Income (benefit) before income taxes 3,381   1,441             (2,342) 40,430   (32,335) (19,167)
Income tax expense (benefit):                            
Current                         (13,402) 139
Deferred                   (2,860) 5,940 2,257 31,518 (4,845)
Income tax expense (benefit) (4,589)   (9,495)             (19,185) (16,981)   18,116 (4,706)
Net income (loss) 7,970   10,936             16,843 57,411 37,313 (50,451) (14,461)
Less: Net (loss) attributable to noncontrolling interest 0   0             0 0      
Net income (loss) attributable to controlling interest 7,970   10,936             16,843 57,411   (50,451) (14,461)
Guarantor [Member]
                            
Condensed Financial Statements [Line Items]                            
Total revenues 119,223   98,969             345,434 302,892   376,229 366,947
Operating expenses 64,297   45,850             186,708 136,849   175,465 237,584
Depreciation and amortization 19,956   17,866             57,335 49,127 65,354 62,744 63,402
Total operating gross margin 34,970   35,253             101,391 116,916   138,020 65,961
General and administration expense (14,028) [1]   (8,823) [1]             (48,942) [1] (21,273) [1]   (30,859) (30,193)
Impairment and other charges                         (170,000)  
Provision for reduction in carrying value of certain assets                         (1,350) (1,952)
Gain on disposition of assets, net (34)   553             1,917 1,168 775 2,706 2,067
Total operating income (loss) 20,908   26,983             54,366 96,811   (61,483) 35,883
Other income and (expense):                            
Interest expense (107)   (43)             (167) (115)   (17,889) (35,640)
Changes in fair value of derivative positions 0   0             0 0      
Interest income 250   179             1,584 4,894   750 757
Changes in fair value of derivative positions 0   0             0 0      
Other (11)   26             (178) 64   (345) 88
Equity in net earnings of subsidiaries 0   0             0 0      
Total other expense 132   162             1,239 4,843   (17,484) (34,795)
Income (benefit) before income taxes 21,040   27,145             55,605 101,654   (78,967) 1,088
Income tax expense (benefit):                            
Current                         27,169 (189)
Deferred                   10,479 4,868 15,429 (57,030) 2,323
Income tax expense (benefit) 10,223   10,451             27,993 38,149   (29,861) 2,134
Net income (loss) 10,817   16,694             27,612 63,505 54,961 (49,106) (1,046)
Less: Net (loss) attributable to noncontrolling interest 0   0             0 0      
Net income (loss) attributable to controlling interest 10,817   16,694             27,612 63,505   (49,106) (1,046)
Non-Guarantor [Member]
                            
Condensed Financial Statements [Line Items]                            
Total revenues 170,609   94,749             388,912 295,811   426,491 401,617
Operating expenses 141,514   84,051             331,056 242,001   358,753 342,783
Depreciation and amortization 15,926   11,913             40,339 36,230 47,663 49,392 51,628
Total operating gross margin 13,169   (1,215)             17,517 17,580   18,346 7,206
General and administration expense (113) [1]   (35) [1]             (367) [1] (412) [1]   (237) (310)
Gain on disposition of assets, net 1,128   53             842 1,298 1,199 953 2,553
Total operating income (loss) 14,184   (1,197)             17,992 18,466   19,062 9,449
Other income and (expense):                            
Interest expense (2,198)   (1,840)             (9,494) (5,811)   (8,865) (16,185)
Changes in fair value of derivative positions 0   0             0 0      
Interest income 2,733   2,573             9,963 39,345   12,189 23,291
Changes in fair value of derivative positions 0   0             0 0      
Other 412   0             511 (2)   20 67
Equity in net earnings of subsidiaries 0   0             0 0      
Total other expense 947   733             980 33,532   3,344 7,173
Income (benefit) before income taxes 15,131   (464)             18,972 51,998   22,406 16,622
Income tax expense (benefit):                            
Current                         19,841 27,571
Deferred                   5,253 (2,405) (1,849) (22,863) 1,214
Income tax expense (benefit) 3,478   5,739             10,033 9,987   (3,022) 28,785
Net income (loss) 11,653   (6,203)             8,939 42,011 32,816 25,428 (12,163)
Less: Net (loss) attributable to noncontrolling interest 148   (105)             221 (146)   (194) (247)
Net income (loss) attributable to controlling interest 11,505   (6,098)             8,718 42,157   25,622 (11,916)
Eliminations [Member]
                            
Condensed Financial Statements [Line Items]                            
Total revenues (52,070)   (28,417)             (103,428) (77,908)   (116,074) (109,089)
Operating expenses (52,070)   (28,417)             (103,428) (77,908)   (116,074) (109,089)
Depreciation and amortization 0   0             0 0      
Total operating gross margin 0   0             0 0      
General and administration expense 0 [1]   0 [1]             0 [1] 0 [1]      
Gain on disposition of assets, net 0   0             0 0      
Total operating income (loss) 0   0             0 0      
Other income and (expense):                            
Interest expense 3,213   2,817             12,521 8,716   30,814 55,791
Changes in fair value of derivative positions 0   0             0 0      
Interest income (3,213)   (2,817)             (12,521) (52,825)   (30,814) (65,791)
Changes in fair value of derivative positions 0   0             0 0      
Other 0   0             0 0      
Equity in net earnings of subsidiaries (22,322)   (10,596)             (36,330) (61,553) (43,884) 23,484 22,962
Total other expense (22,322)   (10,596)             (36,330) (105,662)   23,484 12,962
Income (benefit) before income taxes (22,322)   (10,596)             (36,330) (105,662)   23,484 12,962
Income tax expense (benefit):                            
Deferred                   0 0      
Income tax expense (benefit) 0   0             0 0      
Net income (loss) (22,322)   (10,596)             (36,330) (105,662) (87,992) 23,484 12,962
Less: Net (loss) attributable to noncontrolling interest 0   0             0 0      
Net income (loss) attributable to controlling interest $ (22,322)   $ (10,596)             $ (36,330) $ (105,662)   $ 23,484 $ 12,962
[1] General and administration expenses for field operations are included in operating expenses.