Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (3,835)	$ (31,768)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	10,158	8,144
Provision for doubtful accounts, notes and inventory	17	209
Loss on disposal of assets	137
Derivative loss	466	13,506
Stock-based compensation expense	6,212	4,680
Amortization of debt issuance cost	262	113
Accretion of notes payable	340	555
Gain on sale of equity method investment	(4,705)
Dividend received on equity method investment	1,091
Gain on contingent consideration for acquisition		(2,648)
Changes in operating assets and liabilities, net of assets and liabilities acquired:
Accounts and other receivables	(17,961)	(1,729)
Inventory	(6,066)	(3,369)
Prepaid expenses and other assets	(2,276)	(7,891)
Accounts payable	(11,742)	(8,654)
Accrued expenses and other	10,970	11,956
Net cash used in operating activities	(16,932)	(16,896)
Cash flows from investing activities:
Purchases of short-term investments	(21,227)	(4,564)
Maturities of short-term investments	21,233
Purchases of property and equipment	(21,703)	(36,623)
Proceeds from sale of property and equipment	95
Loans made to customers	(361)	(3,057)
Payments on and proceeds from sales of loans receivable	2,271	2,568
Restricted cash	10,711	9,634
Proceeds from sale of equity method investment	6,119
Net cash used in investing activities	(2,862)	(32,042)
Cash flows from financing activities:
Proceeds from issuance of common stock and exercise of stock options	178	5,947
Proceeds from debt instruments		76
Proceeds from revolving line of credit	6,894	15,069
Repayment of borrowing under revolving line of credit	(7,380)	(15,002)
Repayment of capital lease obligations and debt instruments	(5,601)	(5,547)
Net cash provided by (used in) financing activities	(5,909)	543
Effect of exchange rates on cash and cash equivalents	(247)	936
Net decrease in cash	(25,950)	(47,459)
Cash, beginning of period	108,522	238,125
Cash, end of period	82,572	190,666
Supplemental disclosure of cash flow information:
Income taxes paid	1,653	559
Interest paid, net of approximately $1,517 and $829 capitalized, respectively	$ 4,014	$ 2,359