Summary of Significant Accounting Policies - Multi-client Data Library Costs and Accumulated Amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Multi-client data library capitalized income	$ 6,600	$ 6,100	$ 8,300
Multi Client Data Creation Cost [Abstract]
Gross costs of multi-client data creation	906,306	899,273
Less accumulated amortization	(680,770)	(647,435)
Less impairments to multi-client data library	(119,601)	(119,601)
Total	$ 105,935	$ 132,237