Segment Reporting - Information about Operations in Different Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Revenues	$ 476,083	$ 647,250	$ 1,079,894	$ 1,454,738
Operating income (loss)	28,092	(149,536)	(13,550)	(96,503)
Capital expenditures	117,064	106,826	154,957	144,475
Depreciation and amortization	21,645	19,096	46,247	39,318
Drydock amortization	3,020	4,381	9,966	9,931
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	113,982	229,829	275,807	555,891
Operating income (loss)	4,434	(32,395)	6,525	55,557
Capital expenditures	74,229	41,430	78,297	45,185
Depreciation and amortization	4,955	4,507	9,987	9,537
Drydock amortization	1,569	2,088	3,524	5,049
Middle East [Member]
Segment Reporting Information [Line Items]
Revenues	236,293	230,867	496,654	564,109
Operating income (loss)	12,864	(68,490)	3,436	(86,999)
Capital expenditures	32,132	27,391	39,537	37,943
Depreciation and amortization	7,977	7,516	17,552	14,026
Drydock amortization	468	385	897	1,066
Americas [Member]
Segment Reporting Information [Line Items]
Revenues	125,808	186,554	307,433	334,738
Operating income (loss)	11,125	(48,651)	(20,686)	(65,061)
Capital expenditures	8,120	34,303	30,699	56,313
Depreciation and amortization	7,035	5,181	15,332	11,986
Drydock amortization	983	1,908	5,545	3,816
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(331)		(2,825)
Capital expenditures	2,583	3,702	6,424	5,034
Depreciation and amortization	$ 1,678	$ 1,892	$ 3,376	$ 3,769