CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash Flows From Operating Activities:
Net loss	$ (5,900)	$ (3,192)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	29,093	25,325
(Gain) loss on disposal of property and equipment, net	37	7
Provision for doubtful accounts	793	1,088
Equity in (earnings) of equity-method investment, net of taxes	(333)	(277)
Non-cash changes in deferred rent	(345)	200
Stock-based compensation expense	2,990	3,551
Deferred income taxes	334	462
Other, net	848	619
Changes in operating assets and liabilities:
Accounts receivable	(2,103)	(2,289)
Prepaid expenses, deposits and other assets	(1,338)	(1,587)
Accounts payable	5,206	7,051
Accrued and other liabilities	(1,106)	(1,314)
Deferred revenues	(775)	(904)
Accrued restructuring liability	(364)	(559)
Net cash flows provided by operating activities	27,037	28,181
Cash Flows From Investing Activities:
Purchases of property and equipment	(50,937)	(43,234)
Proceeds from disposal of property and equipment	28	12
Maturities of investments in marketable securities		7,000
Net cash flows used in investing activities	(50,909)	(36,222)
Cash Flows From Financing Activities:
Proceeds from credit agreements		58,500
Principal payments on credit agreements	(750)	(58,500)
Payments on capital lease obligations	(903)	(204)
Proceeds from exercise of stock options	1,062	3,187
Tax withholdings related to net share settlements of restricted stock awards	(691)	(350)
Other, net	(100)	(218)
Net cash flows (used in) provided by financing activities	(1,382)	2,415
Effect of exchange rates on cash and cash equivalents	(39)	11
Net decrease in cash and cash equivalents	(25,293)	(5,615)
Cash and cash equivalents at beginning of period	59,582	73,926
Cash and cash equivalents at end of period	34,289	68,311
Supplemental disclosure of cash flow information:
Cash paid for interest	2,550	1,436
Cash paid for income taxes	253	294
Non-cash acquisition of property and equipment under capital leases	17,210	16,757
Capitalized stock-based compensation	$ 384	$ 98