Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Consolidated net (loss) income	$ (18,533)	$ 596
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	15,363	14,581
Amortization of Financing Costs and Discounts	4,000	3,800
Stock-based compensation	7,764	6,787
Valuation Allowances and Reserves, Period Increase (Decrease)	1,366	28
Other non-cash adjustments	1,661	1,410
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(1,194)	(1,619)
Inventory	(11,743)	(4,098)
Prepaid expenses and other current assets	(2,807)	(929)
Accounts payable and accrued liabilities	4,491	10,373
Increase Decrease In Litigation Liability	(30,000)	0
Accrued payroll and related expenses	(7,068)	(6,823)
Net cash provided by operating activities	23,300	24,106
Investing activities:
Cash paid for business and asset acquisitions	0	(5,031)
Purchases of property and equipment	(13,390)	(9,200)
Purchases of marketable securities	(46,126)	(48,916)
Sales of marketable securities	(36,257)	(68,621)
Net cash (used in) provided by investing activities	(23,259)	5,474
Financing activities:
Principal payment of 2013 Senior Convertible Notes	0	(74,311)
Proceeds from the issuance of common stock	8,749	36
Other assets	(1,094)	100
Net cash provided by (used in) financing activities	7,655	(74,175)
Effect of exchange rate changes on cash	256	(232)
Increase (decrease) in cash and cash equivalents	7,952	(44,827)
Cash and cash equivalents at beginning of period	102,825	123,299
Cash and cash equivalents at end of period	$ 110,777	$ 78,472