Segment Reporting - Information about Segment Assets by Country (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total assets	$ 3,643,199	$ 2,807,371
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	786,707	1,030,823
Middle East [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	1,100,099	1,129,529
Americas [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	744,349	522,713
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	$ 1,009,044	$ 124,306