Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Consolidated net loss	$ (22,802)	$ (6,132)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	31,043	30,341
Amortization of Financing Costs and Discounts	8,081	7,569
Stock-based compensation	16,549	15,548
Valuation Allowances and Reserves, Period Increase (Decrease)	2,383	1,783
Other non-cash adjustments	4,114	4,175
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(8,603)	(8,443)
Inventory	(20,930)	(13,680)
Prepaid expenses and other current assets	(2,839)	(1,722)
Accounts payable and accrued liabilities	5,080	8,830
Increase Decrease In Litigation Liability	(30,000)	0
Accrued payroll and related expenses	(4,473)	(5,885)
Net cash provided by operating activities	48,311	32,384
Goodwill and Intangible Asset Impairment	10,708	0
Investing activities:
Cash paid for business and asset acquisitions	(59)	(7,719)
Purchases of property and equipment	(32,560)	(26,209)
Purchases of marketable securities	(129,080)	(136,988)
Sales of marketable securities	(103,650)	(145,014)
Net cash used in investing activities	(58,049)	(25,902)
Financing activities:
Principal payment of 2013 Senior Convertible Notes	0	(74,311)
Excess Tax Benefit from Share-based Compensation, Financing Activities	0	1,261
Proceeds from the issuance of common stock	14,193	3,123
Payments for Repurchase of Common Stock	(44)	0
Other assets	(1,142)	26
Net cash provided by (used in) financing activities	13,007	(69,901)
Effect of exchange rate changes on cash	367	(1,000)
Increase (decrease) in cash and cash equivalents	3,636	(64,419)
Cash and cash equivalents at beginning of period	102,825	123,299
Cash and cash equivalents at end of period	$ 106,461	$ 58,880