Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Trade, allowance for doubtful accounts	$ 352	$ 737
Notes and other, allowance for doubtful accounts	988	988
Seismic data library, accumulated amortization	911,781	889,804
Property and equipment, accumulated depreciation and amortization	13,755	13,461
Intangible assets, accumulated amortization	$ 35,214	$ 34,087
Common stock, par value per share	$ 0.001	$ 0.001
Common stock, shares authorized	100	100
Common stock, shares issued	100	100
Common stock, shares outstanding	100	100