Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 43,264	$ 6,679
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization, net	41,630	43,236
Impairment losses	764	4,004
Unrealized foreign currency transaction (gains) losses, net	1,743	(2,860)
Stock-based compensation expense	3,411	3,652
Excess tax (benefit) provision from stock-based compensation	52	(360)
Deferred income tax (benefit)	(3,830)	(8,644)
Net (gain) loss on disposal of property and equipment	(3,450)	16
Bad debt expense	322	58
Unrealized losses on financial instruments, net	273	377
Increase (decrease) in valuation allowance on deferred tax assets	(1,394)	1,588
Amortization of deferred loan fees	439	2,772
Net (gain) on insurance settlement	(481)
Other	759	426
Changes in assets and liabilities, net of acquisition:
Receivables	6,362	3,301
Prepaid expenses	(4,272)	(410)
Other current assets	(5,475)	(5,500)
Deferred charges and other assets	2,072	1,123
Accounts payable	(4,159)	(3,952)
Income taxes receivable / payable	(3,244)	(7,542)
Accrued employee compensation and benefits	11,615	2,019
Other accrued expenses and current liabilities	(5,211)	(1,247)
Deferred revenue	2,025	593
Other long-term liabilities	(3,316)	828
Net cash provided by operating activities	79,899	40,157
Cash flows from investing activities:
Capital expenditures	(21,788)	(21,501)
Cash paid for business acquisition, net of cash acquired		(77,174)
Proceeds from sale of property and equipment	3,949	23
Investment in restricted cash	(520)	(260)
Release of restricted cash		80,000
Proceeds from insurance settlement	1,654
Net cash (used for) investing activities	(16,705)	(18,912)
Cash flows from financing activities:
Payment of long-term debt		(75,000)
Proceeds from issuance of long-term debt		75,000
Proceeds from issuance of stock	191	34
Excess tax benefit (provision) from stock-based compensation	(52)	360
Cash paid for repurchase of common stock	(42,677)	(5,212)
Proceeds from grants	81	148
Payments on short-term debt		(85,000)
Shares repurchased for minimum tax withholding on equity awards	(1,190)	(1,282)
Cash paid for loan fees related to debt		(3,035)
Net cash (used for) financing activities	(43,647)	(93,987)
Effects of exchange rates on cash	(4,586)	(4,354)
Net increase (decrease) in cash and cash equivalents	14,961	(77,096)
Cash and cash equivalents - beginning	189,829	279,853
Cash and cash equivalents - ending	204,790	202,757
Supplemental disclosures of cash flow information:
Cash paid during period for interest	787	2,431
Cash paid during period for income taxes	18,233	16,811
Non-cash transactions:
Property and equipment additions in accounts payable	1,503	1,331
Unrealized gain on postretirement obligation in accumulated other comprehensive income (loss)	122	202
Issuance of common stock for business acquisition		$ 136,673