Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Trade, allowance for doubtful accounts	$ 228	$ 267
Notes and other, allowance for doubtful accounts	0	0
Seismic data library, accumulated amortization	1,168,969	1,098,398
Property and equipment, accumulated depreciation and amortization	16,295	15,147
Intangible assets, accumulated amortization	$ 47,166	$ 43,232
Common stock, par value per share (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100	100
Common stock, shares issued (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100