CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flows From Operating Activities:
Net income (loss)	$ 107	$ (1,500)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	9,094	8,928
(Gain) loss on disposal of property and equipment, net	(16)	73
Stock-based compensation expense	1,404	911
Equity in (earnings) of equity-method investment	(60)	(147)
Provision for doubtful accounts	79	165
Non-cash changes in deferred rent	(240)	(70)
Deferred income taxes		(45)
Other, net	461	156
Changes in operating assets and liabilities:
Accounts receivable	575	963
Prepaid expenses, deposits and other assets	820	(657)
Accounts payable	5,505	(6,973)
Accrued and other liabilities	1,323	(1,086)
Deferred revenues	134	(130)
Accrued restructuring liability	(661)	(497)
Net cash flows provided by operating activities	18,525	91
Cash Flows From Investing Activities:
Purchases of property and equipment	(16,824)	(12,646)
Net cash flows used in investing activities	(16,824)	(12,646)
Cash Flows From Financing Activities:
Principal payments on credit agreement		(250)
Payments on capital lease obligations	(612)	(361)
Proceeds from exercise of stock options	628	365
Tax withholdings related to net share settlements of restricted stock awards	(721)	(480)
Other, net	(35)	(33)
Net cash flows used in financing activities	(740)	(759)
Effect of exchange rates on cash and cash equivalents	116	30
Net increase (decrease) in cash and cash equivalents	1,077	(13,284)
Cash and cash equivalents at beginning of period	29,772	59,582
Cash and cash equivalents at end of period	30,849	46,298
Supplemental disclosure of cash flow information:
Cash paid for interest	901	907
Cash paid for income taxes	20	142
Non-cash acquisition of property and equipment under capital leases	7,406	9,258
Capitalized stock-based compensation	$ 131	$ 104