UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flows from Operating Activities:
Net loss	$ (31,237)	$ (9,380)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	59,308	37,718
Impairment of property and equipment	537	520
Amortization of debt discount and issuance costs	1,441	182
Stock-based compensation expense, net of capitalized amount	5,675	5,085
Equity in (earnings) of equity-method investment	(198)	(157)
Provision for doubtful accounts	811	1,077
Non-cash change in capital lease obligations	(87)	121
Non-cash change in exit activities and restructuring liability	2,996	921
Non-cash change in deferred rent	(2,028)	(1,371)
Deferred taxes	(1,226)	225
Other, net	197	338
Changes in operating assets and liabilities:
Accounts receivable	3,198	(3,043)
Prepaid expenses, deposits and other assets	(3,080)	(368)
Accounts payable	(2,585)	(4,614)
Accrued and other liabilities	4,795	(1,023)
Deferred revenues	99	311
Exit activities and restructuring liability	(2,296)	(2,180)
Other liabilities	(90)	(613)
Net cash flows provided by operating activities	36,230	23,749
Cash Flows from Investing Activities:
Purchases of property and equipment	(51,312)	(31,721)
Additions to acquired technology	(2,004)	(476)
Proceeds from sale-leaseback transactions	2,603
Net cash from acquisition	74
Net cash flows used in investing activities	(50,639)	(32,197)
Cash Flows from Financing Activities:
Proceeds from credit agreements	5,000	20,000
Principal payments on credit agreements	(2,250)	(2,625)
Return of deposit collateral on credit agreement	6,461
Payments on capital lease obligations	(4,212)	(3,475)
Proceeds from exercise of stock options	973	1,979
Tax withholdings related to net share settlements of restricted stock awards	(744)	(1,443)
Other, net	(135)	(126)
Net cash flows provided by financing activities	5,093	14,310
Effect of exchange rates on cash and cash equivalents	(209)	26
Net (decrease) increase in cash and cash equivalents	(9,525)	5,888
Cash and cash equivalents at beginning of period	35,018	28,553
Cash and cash equivalents at end of period	25,493	34,441
Supplemental disclosure of cash flow information:
Cash paid for interest	18,109	7,114
Cash paid for income taxes	134	336
Non-cash acquisition of property and equipment under capital leases	7,757	9,552
Additions to property and equipment included in accounts payable	11,117	15,665
Capitalized stock-based compensation	$ 271	$ 331