Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Trade, allowance for doubtful accounts	$ 1,034	$ 2,556
Notes and other, allowances for doubtful accounts	1,501
Net seismic data library, accumulated amortization	689,654	622,030
Net property and equipment, accumulated depreciation and amortization	10,955	9,704
Intangible assets, accumulated amortization	$ 27,217	$ 23,777
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