Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 88,585	$ 60,971
Accounts receivable, net	62,901	127,136
Unbilled receivables	82,894	89,784
Inventories	61,404	70,675
Prepaid expenses and other current assets	25,698	25,605
Total current assets	321,482	374,171
Deferred income tax asset	0	28,414
Property, plant, equipment and seismic rental equipment, net	49,360	33,772
Multi-client data library, net	242,870	230,315
Equity method investments	69,624	73,925
Goodwill	55,322	55,349
Intangible assets, net	11,986	14,841
Other assets	15,199	9,796
Total assets	765,843	820,583
Current liabilities:
Current maturities of long-term debt	5,193	3,496
Accounts payable	31,808	28,688
Accrued expenses	60,360	124,095
Accrued multi-client data library royalties	24,661	26,300
Deferred revenue	20,361	26,899
Total current liabilities	142,383	209,478
Long-term debt, net of current maturities	180,530	101,832
Other long-term liabilities	207,044	8,131
Total liabilities	529,957	319,441
Redeemable noncontrolling interest	1,881	2,123
Equity:
Cumulative convertible preferred stock	0	27,000
Common stock, $0.01 par value; authorized 200,000,000 shares; outstanding 163,298,996 and 156,356,949 shares at September 30, 2013 and December 31, 2012, respectively, net of treasury stock	1,633	1,564
Additional paid-in capital	877,891	848,669
Accumulated deficit	(625,976)	(360,297)
Accumulated other comprehensive loss	(13,300)	(11,886)
Treasury stock, at cost, 849,539 shares at both September 30, 2013 and December 31, 2012	(6,565)	(6,565)
Total stockholders' equity	233,683	498,485
Noncontrolling interests	322	534
Total equity	234,005	499,019
Total liabilities and equity	$ 765,843	$ 820,583