Segment and Related Information (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Financial information by business segment
Revenues from unaffiliated customers	$ 902,621	$ 588,347	$ 2,483,379	$ 1,715,225
Depreciation and amortization	46,929	30,410	137,318	92,088
Operating income (loss)	144,464	70,390	354,404	187,948
Equity in earnings (loss) of unconsolidated affiliates	(204)	80	(151)	144
Capital expenditures	140,912	44,875	371,165	120,952
Total assets	3,437,012	2,088,909	3,437,012	2,088,909	3,015,999
Rental tools [Member]
Financial information by business segment
Revenues from unaffiliated customers	127,217	91,856	347,406	238,477
Depreciation and amortization	10,364	9,839	30,459	30,753
Operating income (loss)	32,939	14,446	82,432	29,219
Capital expenditures	24,155	11,308	59,650	28,334
Total assets	435,281	369,050	435,281	369,050
Total well site services [Member]
Financial information by business segment
Revenues from unaffiliated customers	172,767	125,725	467,059	336,885
Depreciation and amortization	15,397	15,646	45,232	49,423
Operating income (loss)	40,912	14,933	99,010	26,654
Capital expenditures	33,045	13,390	81,462	34,953
Total assets	559,891	478,389	559,891	478,389
Accommodations [Member]
Financial information by business segment
Revenues from unaffiliated customers	227,783	127,719	627,824	395,208
Depreciation and amortization	27,395	11,560	80,143	32,842
Operating income (loss)	71,727	37,679	178,451	116,347
Equity in earnings (loss) of unconsolidated affiliates			2
Capital expenditures	101,604	28,283	270,519	73,724
Total assets	1,662,776	655,983	1,662,776	655,983
Offshore products [Member]
Financial information by business segment
Revenues from unaffiliated customers	139,525	102,376	399,709	311,375
Depreciation and amortization	3,421	2,739	10,112	8,314
Operating income (loss)	24,854	14,570	60,374	43,278
Equity in earnings (loss) of unconsolidated affiliates	(487)		(715)
Capital expenditures	4,416	2,130	11,990	8,110
Total assets	602,636	494,235	602,636	494,235
Tubular services [Member]
Financial information by business segment
Revenues from unaffiliated customers	362,546	232,527	988,787	671,757
Depreciation and amortization	515	291	1,243	976
Operating income (loss)	17,934	12,003	47,936	27,514
Equity in earnings (loss) of unconsolidated affiliates	283	80	562	144
Capital expenditures	1,709	964	6,860	3,807
Total assets	527,964	432,977	527,964	432,977
Corporate and eliminations [Member]
Financial information by business segment
Depreciation and amortization	201	174	588	533
Operating income (loss)	(10,963)	(8,795)	(31,367)	(25,845)
Capital expenditures	138	108	334	358
Total assets	83,745	27,325	83,745	27,325
Drilling services [Member]
Financial information by business segment
Revenues from unaffiliated customers	45,550	33,869	119,653	98,408
Depreciation and amortization	5,033	5,807	14,773	18,670
Operating income (loss)	7,973	487	16,578	(2,565)
Capital expenditures	8,890	2,082	21,812	6,619
Total assets	$ 124,610	$ 109,339	$ 124,610	$ 109,339