Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ 78,932		$ (68,938)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation and amortization (other than multi-client library)	13,785		8,302
Amortization of multi-client library	34,257		36,679
Stock-based compensation expense	5,033		3,831
Equity in losses of investments	3,469		5,222
Accrual for (reduction of) loss contingency related to legal proceedings	(69,557)		110,000
Gain on sale of Source product line	(6,522)	[1]	0
Gain on sale of cost-method investment	0		(3,591)
Deferred income taxes	(5,612)		(48,627)
Change in operating assets and liabilities:
Accounts receivable	73,254		34,259
Unbilled receivables	(14,236)		(9,160)
Inventories	(3,197)		(8,993)
Accounts payable, accrued expenses and accrued royalties	(30,807)		(11,391)
Deferred revenue	(4,988)		(8,242)
Other assets and liabilities	2,927		4,026
Net cash provided by operating activities	76,738		43,377
Cash flows from investing activities:
Cash invested in multi-client data library	(34,317)		(48,599)
Purchase of property, plant, equipment and seismic rental assets	(4,543)		(8,963)
Repayment of advances to INOVA Geophysical	1,000		0
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	605		76
Net cash used in investing activities	(25,935)		(64,836)
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 long-term debt	(5,595)		(1,815)
Cost associated with issuance of notes	0		(6,731)
Payment of preferred dividends	0		(676)
Proceeds from exercise of stock options	340		1,972
Other financing activities	(679)		302
Net cash (used in) provided by financing activities	(40,934)		70,802
Effect of change in foreign currency exchange rates on cash and cash equivalents	(146)		(813)
Net increase in cash and cash equivalents	9,723		48,530
Cash and cash equivalents at beginning of period	148,056		60,971
Cash and cash equivalents at end of period	$ 157,779		$ 109,501

[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.