Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 197,306	$ 148,056
Accounts receivable, net	98,231	149,448
Unbilled receivables	68,452	49,468
Inventories	54,709	57,173
Prepaid expenses and other current assets	25,605	24,772
Total current assets	444,303	428,917
Deferred income tax asset	14,339	14,650
Property, plant, equipment and seismic rental equipment, net	59,811	46,684
Multi-client data library, net	243,083	238,784
Equity method investments	47,466	53,865
Goodwill	56,111	55,876
Intangible assets, net	10,566	11,247
Other assets	15,640	14,648
Total assets	891,319	864,671
Current liabilities:
Current maturities of long-term debt	60,551	5,906
Accounts payable	38,654	22,654
Accrued expenses	72,471	84,358
Accrued multi-client data library royalties	38,263	46,460
Deferred revenue	16,030	20,682
Total current liabilities	225,969	180,060
Long-term debt, net of current maturities	180,462	214,246
Other long-term liabilities	142,987	210,602
Total liabilities	549,418	604,908
Redeemable noncontrolling interest	5,552	1,878
Equity:
Common stock, $0.01 par value; authorized 200,000,000 shares; outstanding 164,049,309 and 163,737,757 shares at March 31, 2014 and December 31, 2013, respectively, net of treasury stock	1,640	1,637
Additional paid-in capital	882,892	879,969
Accumulated deficit	(530,178)	(606,157)
Accumulated other comprehensive loss	(11,799)	(11,138)
Treasury stock, at cost, 849,539 shares at both March 31, 2014 and December 31, 2013	(6,565)	(6,565)
Total stockholders' equity	335,990	257,746
Noncontrolling interests	359	139
Total equity	336,349	257,885
Total liabilities and equity	$ 891,319	$ 864,671