Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Income Tax Disclosure [Abstract]
U.S. - federal and state, current	$ (4)		$ 32		$ (150)
Foreign, current	10,299		10,115		14,136
Total current	10,295		10,147		13,986
U.S. - federal and state, deferred	2,952		(2,973)		(6,494)
Foreign, deferred	1,671		(5,134)		(2,682)
Total deferred	4,623		(8,107)		(9,176)
Total provision for income taxes	$ 14,918	[1]	$ 2,040	[1]	$ 4,810	[1]

[1] During the fourth quarter of 2010, the Company re-assessed its operating segments and concluded that its multi-client data library business is a separate operating segment. Accordingly, prior periods have been restated.