CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES:
Net income (loss)	$ (29,160)	$ 28,418
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	35,695	39,122
Goodwill, Impairment Loss	46,738	0
Deferred income tax (benefit) provision	(7,238)	(3,184)
Amortization of debt issuance costs	1,707	2,103
Non-cash interest expense	4,865	8,284
Payment of accreted interest	0	(30,617)
Loss on disposal of property and equipment	1,816	807
Share-based compensation	7,594	6,632
Excess tax benefits from stock-based compensation arrangements	(140)	(432)
Changes in assets and liabilities, net of business acquisitions:
Accounts receivable	1,440	(1,333)
Inventories	(34,855)	1,080
Prepaid expenses and other current assets	(282)	8,148
Other non-current assets	(515)	(877)
Accounts payable, accrued expenses and other current liabilities	14,185	6,528
Deferred revenue	986	(913)
Other non-current liabilities	(1,264)	(1,263)
Net cash provided by operating activities	41,572	62,503
INVESTING ACTIVITIES:
Purchases of property and equipment	(37,722)	(44,359)
Sales of property and equipment	533	0
Cash used in business acquisition, net of cash acquired	(2,980)	(2,177)
Purchases of short-term investments	0	(67,907)
Maturities of short-term investments	0	64,940
Net cash used in investing activities	(40,169)	(49,503)
FINANCING ACTIVITIES:
Borrowings under senior credit facility	30,000	155,000
Repayments under senior credit facility	(10,000)	(12,812)
Payment of liability component of convertible notes	0	(134,383)
Payment of debt issuance costs	(1,053)	0
Proceeds from exercised stock options	420	696
Excess tax benefits from stock-based compensation arrangements	140	432
Net cash provided by (used in) financing activities	19,507	8,933
Effect of exchange rate changes on cash and cash equivalents	1,020	2,977
Net change in cash and cash equivalents	21,930	24,910
Cash and cash equivalents at beginning of period	96,938	100,808
Cash and cash equivalents at end of period	$ 118,868	$ 125,718