Quarterly report pursuant to Section 13 or 15(d)

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
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Condensed Financial Statements [Line Items]        
Total revenues $ 242,012 $ 237,762 $ 725,471 $ 630,851
Operating expenses 160,797 153,147 501,391 413,294
Depreciation and amortization 36,149 35,882 106,666 97,674
Total operating gross margin 45,066 48,733 117,414 119,883
General and administration expense (9,370) (14,238) (25,341) (49,286)
Gain (loss) on disposition of assets, net (457) 1,094 433 2,759
Total operating income 35,239 35,589 92,506 73,356
Other income and (expense):        
Interest expense (10,848) (13,127) (33,486) (33,874)
Interest income 36 130 156 2,392
Loss on extinguishment of debt 0 (5,218) (30,152) (5,218)
Change in fair value of derivative positions 0 0 0 54
Other (536) (144) 1,391 (805)
Equity in net earnings of subsidiaries 0 0 0 0
Total other expense (11,348) (18,359) (62,091) (37,451)
Income before income taxes 23,891 17,230 30,415 35,905
Income tax expense 11,014 9,112 14,093 18,841
Deferred Income Tax Expense (Benefit)     73 12,872
Net income 12,877 8,118 16,322 17,064
Less: Net income (loss) attributable to noncontrolling interest 311 148 624 221
Net income attributable to controlling interest 12,566 7,970 15,698 16,843
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 110 (47) (195) (140)
Gain (loss) on disposition of assets, net 0 0 (79) 0
Total operating income 110 (47) (274) (140)
Other income and (expense):        
Interest expense (11,529) (14,035) (35,542) (36,734)
Interest income 98 360 632 3,366
Loss on extinguishment of debt 0 (5,218) (30,152) (5,218)
Change in fair value of derivative positions   0   54
Other 0 (1) 0 0
Equity in net earnings of subsidiaries 19,442 22,322 50,591 36,330
Total other expense 8,011 3,428 (14,471) (2,202)
Income before income taxes 8,121 3,381 (14,745) (2,342)
Income tax expense (4,445) (4,589) (30,443) (19,185)
Deferred Income Tax Expense (Benefit)     (15,774) (2,860)
Net income 12,566 7,970 15,698 16,843
Less: Net income (loss) attributable to noncontrolling interest 0 0 0 0
Net income attributable to controlling interest 12,566 7,970 15,698 16,843
Guarantor [Member]
        
Condensed Financial Statements [Line Items]        
Total revenues 129,935 119,223 396,536 345,367
Operating expenses 65,369 64,297 222,846 186,708
Depreciation and amortization 22,168 19,956 63,343 57,335
Total operating gross margin 42,398 34,970 110,347 101,324
General and administration expense (8,988) (14,103) (23,806) (48,861)
Gain (loss) on disposition of assets, net 91 (34) 522 1,917
Total operating income 33,501 20,833 87,063 54,380
Other income and (expense):        
Interest expense (35) (107) (120) (167)
Interest income 176 250 553 1,584
Loss on extinguishment of debt 0 0 0 0
Change in fair value of derivative positions   0   0
Other 675 64 860 (192)
Equity in net earnings of subsidiaries 0 0 0 0
Total other expense 816 207 1,293 1,225
Income before income taxes 34,317 21,040 88,356 55,605
Income tax expense 14,337 10,223 34,187 27,993
Deferred Income Tax Expense (Benefit)     12,525 10,479
Net income 19,980 10,817 54,169 27,612
Less: Net income (loss) attributable to noncontrolling interest 0 0 0 0
Net income attributable to controlling interest 19,980 10,817 54,169 27,612
Non-Guarantor [Member]
        
Condensed Financial Statements [Line Items]        
Total revenues 156,495 170,609 461,460 388,912
Operating expenses 139,846 140,920 411,070 330,014
Depreciation and amortization 13,981 15,926 43,323 40,339
Total operating gross margin 2,668 13,763 7,067 18,559
General and administration expense (492) (88) (1,340) (285)
Gain (loss) on disposition of assets, net (548) 1,128 (10) 842
Total operating income 1,628 14,803 5,717 19,116
Other income and (expense):        
Interest expense (1,943) (2,198) (6,356) (9,494)
Interest income 2,421 2,733 7,503 9,963
Loss on extinguishment of debt 0 0 0 0
Change in fair value of derivative positions   0   0
Other (1,211) (207) 531 (613)
Equity in net earnings of subsidiaries 0 0 0 0
Total other expense (733) 328 1,678 (144)
Income before income taxes 895 15,131 7,395 18,972
Income tax expense 1,122 3,478 10,349 10,033
Deferred Income Tax Expense (Benefit)     3,322 5,253
Net income (227) 11,653 (2,954) 8,939
Less: Net income (loss) attributable to noncontrolling interest 311 148 624 221
Net income attributable to controlling interest (538) 11,505 (3,578) 8,718
Eliminations [Member]
        
Condensed Financial Statements [Line Items]        
Total revenues (44,418) (52,070) (132,525) (103,428)
Operating expenses (44,418) (52,070) (132,525) (103,428)
Depreciation and amortization 0 0 0 0
Total operating gross margin 0 0 0 0
General and administration expense 0 0 0 0
Gain (loss) on disposition of assets, net 0 0 0 0
Total operating income 0 0 0 0
Other income and (expense):        
Interest expense 2,659 3,213 8,532 12,521
Interest income (2,659) (3,213) (8,532) (12,521)
Loss on extinguishment of debt 0 0 0 0
Change in fair value of derivative positions   0   0
Other 0 0 0 0
Equity in net earnings of subsidiaries (19,442) (22,322) (50,591) (36,330)
Total other expense (19,442) (22,322) (50,591) (36,330)
Income before income taxes (19,442) (22,322) (50,591) (36,330)
Income tax expense 0 0 0 0
Deferred Income Tax Expense (Benefit)     0 0
Net income (19,442) (22,322) (50,591) (36,330)
Less: Net income (loss) attributable to noncontrolling interest 0 0 0 0
Net income attributable to controlling interest $ (19,442) $ (22,322) $ (50,591) $ (36,330)