Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ 54,010		$ (266,194)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and amortization (other than multi-client library)	20,989		13,146
Amortization of multi-client library	46,014		50,892
Stock-based compensation expense	7,058		5,707
Equity in losses of investments	9,027		10,414
Accrual for (reduction of) loss contingency related to legal proceedings	(69,557)		181,776
Gain on sale of Source product line	(6,522)	[1]	0
Gain on sale of cost-method investment	0		(3,591)
Write-down of multi-client data library	0		5,461
Write-down of receivables from OceanGeo	0		9,157
Write-down of excess and obsolete inventory	0		21,197
Deferred income taxes	(1,536)		7,768
Change in operating assets and liabilities:
Accounts receivable	71,540		57,481
Unbilled receivables	(8,036)		6,890
Inventories	(4,272)		(13,157)
Accounts payable, accrued expenses and accrued royalties	(31,324)		(6,179)
Deferred revenue	(4,153)		(6,527)
Other assets and liabilities	3,738		4,274
Net cash provided by operating activities	86,976		78,515
Cash flows from investing activities:
Cash invested in multi-client data library	(57,340)		(86,346)
Purchase of property, plant, equipment and seismic rental assets	(6,842)		(13,539)
Repayment of (advances to) INOVA Geophysical	1,000		(8,000)
Investment in and advances to OceanGeo B.V.	(3,683)		(9,500)
Cash of OceanGeo B.V. upon acquiring a controlling interest	609		0
Net proceeds from sale of Source product line	14,394		0
Proceeds from sale of a cost-method investment	0		4,150
Investment in convertible note	0		(2,000)
Other investing activities	928		76
Net cash used in investing activities	(50,934)		(115,159)
Cash flows from financing activities:
Proceeds from issuance of notes	0		175,000
Borrowings under revolving line of credit	15,000		0
Payments under revolving line of credit	(50,000)		(97,250)
Payments on notes payable and long-term debt	(11,737)		(3,296)
Cost associated with issuance of notes	(2,126)		(6,731)
Acquisition of non-controlling interest	(6,000)		0
Payment of preferred dividends	0		(1,014)
Conversion payment of preferred stock	0		(5,000)
Proceeds from employee stock purchases and exercise of stock options	577		2,367
Other financing activities	(154)		790
Net cash (used in) provided by financing activities	(54,440)		64,866
Effect of change in foreign currency exchange rates on cash and cash equivalents	189		(608)
Net (decrease) increase in cash and cash equivalents	(18,209)		27,614
Cash and cash equivalents at beginning of period	148,056		60,971
Cash and cash equivalents at end of period	$ 129,847		$ 88,585

[1] In May 2014, the Company sold its Source product line for approximately $14.4 million, net of transaction fees, recording a gain of approximately $6.5 million before taxes. As a part of this transaction, the Company reduced Goodwill on the Marine reporting unit by $5.1 million. The historical results of this product line have not been material to the Company’s results of operations.