Segment Reporting - Information about Segment Assets by Country (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total assets	$ 3,023,929	$ 2,807,371
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	740,507	1,030,823
Americas [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	795,598	522,713
Middle East [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	1,148,041	1,129,529
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets, continuing operations	$ 339,783	$ 124,306