Quarterly report pursuant to Section 13 or 15(d)

Reportable Segments - Results of Operations by Reportable Segment (Detail)

v3.3.0.814
Reportable Segments - Results of Operations by Reportable Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Revenues:        
Revenues $ 173,418 $ 242,012 $ 563,435 $ 725,471
Operating gross margin:        
Total operating gross margin 4,871 45,066 33,159 117,414
General and administration expense (8,895) (9,370) (29,243) (25,341)
Other Asset Impairment Charges (906) 0 (3,222) 0
Gain (loss) on disposition of assets, net 383 (457) 2,686 433
Total operating income (loss) (4,547) 35,239 3,380 92,506
Interest expense (11,293) (10,848) (33,767) (33,486)
Interest income 7 36 209 156
Loss on extinguishment of debt 0 0 0 (30,152)
Other (719) (536) (3,628) 1,391
Income (loss) before income taxes (16,552) 23,891 (33,806) 30,415
Rental Tools [Member]        
Revenues:        
Revenues 56,796 87,711 196,978 255,387
Operating gross margin:        
Total operating gross margin (944) 19,652 16,404 50,761
U.S. (Lower 48) Drilling [Member]        
Revenues:        
Revenues 5,961 44,409 26,906 126,281
Operating gross margin:        
Total operating gross margin (7,397) 16,283 (20,673) 42,829
International & Alaska Drilling [Member]        
Revenues:        
Revenues 110,661 109,892 339,551 343,803
Operating gross margin:        
Total operating gross margin $ 13,212 $ 9,131 $ 37,428 $ 23,824
Exxon Neftegas Limited [Member]        
Segment Reporting Information [Line Items]        
Percentage of revenue from major customer     27.00% 18.90%
Exxon Neftegas Limited [Member] | International & Alaska Drilling [Member]        
Segment Reporting Information [Line Items]        
Percentage of revenue from major customer     44.70% 39.90%