Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net income (loss)	$ 2,720	$ (11,588)	$ (10,066)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	17,009	18,170	20,788
Debt discount amortization	5,450	10,538	8,149
Deferred income taxes	618	165	200
Stock-based compensation	3,469	3,146	3,628
Loss on disposal of property, plant and equipment	1,909	711	436
Other non-cash adjustments	(314)	621	1,224
Changes in operating assets and liabilities:
Accounts receivable	2,660	23,931	(21,915)
Inventories	11,376	125	1,083
Prepaid expenses and other assets	(405)	(19)	2,474
Accounts payable	(731)	(3,215)	(1,407)
Accrued expenses and other liabilities	16,784	(8,385)	6,604
Income taxes receivable (payable)	(102)	(353)	7,796
Net cash provided by operating activities	60,443	33,847	18,994
Investing Activities
Expenditures for property, plant and equipment	(7,593)	(7,419)	(9,966)
Proceeds from sales of property, plant and equipment	3	28	85
Purchase of acquired company, net of cash acquired	(11)	(2,075)
Notes receivable, net	117	99	108
Net cash used in investing activities	(7,484)	(9,367)	(9,773)
Financing Activities
Financing costs	(750)	(135)
Restricted cash	37,000	(37,000)
Borrowings under line of credit	93,700		44,000
Principal payments under line of credit	(88,700)		(44,000)
Principal payments under mortgages and notes	(91,875)	(2,542)	(545)
Repurchases of convertible notes		(5,882)
Repurchases of common stock	(5,522)	(3,092)	(1,089)
Proceeds from employee stock purchase and option plans	821	1,427	169
Net cash used in financing activities	(55,326)	(47,224)	(1,465)
Net increase (decrease) in cash and cash equivalents	(2,367)	(22,744)	7,756
Cash and cash equivalents at beginning of year	4,526	27,270	19,514
Cash and cash equivalents at end of year	2,159	4,526	27,270
Supplemental disclosures of cash flow information:
Cash paid for interest, net of capitalized interest	5,792	6,349	6,526
Cash paid (received) for income taxes, net	$ 590	$ 658	$ (7,553)