Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 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	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Drilling Services Revenue									$ 249,318	$ 516,473	$ 528,327
Production Services Revenue									291,460	538,750	431,859
Revenues	$ 104,473	$ 107,480	$ 135,011	$ 193,814	$ 283,110	$ 273,267	$ 259,812	$ 239,034	540,778	1,055,223	960,186
Costs and expenses:
Drilling Services Costs and Expenses									144,196	348,133	354,380
Production Services Costs and Expenses									213,820	339,690	276,296
Depreciation and amortization									150,939	183,376	187,918
General and administrative									73,903	103,385	94,183
Bad debt expense (recovery)									(188)	1,445	767
Impairment charges									129,152	73,025	54,292
Gain on dispositions of property and equipment, net									(4,344)	(1,859)	(1,421)
Gain on sale of fishing and rental services operations									0	(10,702)	0
Gain on litigation									0	(5,254)	0
Total costs and expenses									707,478	1,031,239	966,415
Income (loss) from operations	(65,286)	(17,972)	(75,108)	(8,334)	(48,672)	32,804	21,917	17,935	(166,700)	23,984	(6,229)
Other (expense) income:
Interest expense, net of interest capitalized									(21,222)	(38,781)	(48,310)
Loss on extinguishment of debt									(2,186)	(31,221)	0
Other									(2,611)	(3,304)	(1,239)
Total other (expense) income									(26,019)	(73,306)	(49,549)
Income (loss) before income taxes									(192,719)	(49,322)	(55,778)
Income tax expense (benefit)	23,861	6,682	2,586	4,450	20,198	(9,927)	1,070	(37)	37,579	11,304	19,846
Net income (loss)	$ (48,300)	$ (17,540)	$ (77,281)	$ (12,019)	$ (47,573)	$ 12,453	$ (319)	$ (2,579)	$ (155,140)	$ (38,018)	$ (35,932)
Income (loss) per common share - Basic	$ (0.75)	$ (0.27)	$ (1.20)	$ (0.19)	$ (0.75)	$ 0.20	$ (0.01)	$ (0.04)	$ (2.41)	$ (0.60)	$ (0.58)
Income (loss) per common share - Diluted	$ (0.75)	$ (0.27)	$ (1.20)	$ (0.19)	$ (0.75)	$ 0.19	$ (0.01)	$ (0.04)	$ (2.41)	$ (0.60)	$ (0.58)
Weighted average number of shares outstanding - Basic									64,310	63,161	62,213
Weighted-average number of shares outstanding - Diluted									64,310	63,161	62,213