Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Reportable Segments - Results of Operations by Reportable Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Revenues:                        
Revenues $ 148,748 $ 173,418 $ 185,941 $ 204,076 $ 243,213 $ 242,012 $ 254,234 $ 229,225   $ 712,183 $ 968,684 $ 874,172
Operating income:                        
Total operating gross margin (3,460) 4,871 4,021 24,267 36,768 45,066 43,485 28,863   29,699 154,182 168,447
General and administrative expense                   (36,190) (35,016) (68,025)
Provision for reduction in carrying value of certain assets (4,300) 4,800             $ (3,200) (12,490) 0 (2,544)
Gain on disposition of assets, net                   1,643 1,054 3,994
Total operating income (20,718) $ (4,547) $ (7,944) $ 15,871 27,714 $ 35,239 $ 37,497 $ 19,770   (17,338) 120,220 101,872
Interest expense                   (45,155) (44,265) (47,820)
Interest income                   269 195 2,450
Loss on extinguishment of debt                   0 (30,152) (5,218)
Other                   (9,747) 2,539 1,503
Income (loss) before income taxes                   (71,971) 48,537 52,787
Identifiable assets:                        
Total identifiable assets 1,161,186       1,333,690         1,161,186 1,333,690  
Total assets 1,376,904       1,520,659         1,376,904 1,520,659  
U.S. (Lower 48) Drilling [Member]                        
Revenues:                        
Revenues                   30,358 158,405 153,624
Operating income:                        
Total operating gross margin                   (28,309) 46,831 54,203
Identifiable assets:                        
Total identifiable assets 102,121       124,701         102,121 124,701  
International & Alaska Drilling [Member]                        
Revenues:                        
Revenues                   435,096 462,513 410,507
Operating income:                        
Total operating gross margin                   45,211 34,405 23,080
Identifiable assets:                        
Total identifiable assets 629,784       764,794         629,784 764,794  
Drilling Services [Member]                        
Revenues:                        
Revenues                   465,454 620,918 564,131
Operating income:                        
Total operating gross margin                   16,902 81,236 77,283
Rental Tools [Member]                        
Revenues:                        
Revenues                   246,729 347,766 310,041
Operating income:                        
Total operating gross margin                   12,797 72,946 $ 91,164
Identifiable assets:                        
Total identifiable assets $ 429,281       $ 444,195         $ 429,281 $ 444,195