Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Activities
Net income (loss)	$ 34,598	$ 2,720	$ (11,588)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	16,255	17,009	18,170
Debt discount amortization		5,450	10,538
Deferred income taxes	(12,698)	618	165
Stock-based compensation	3,811	3,469	3,146
Loss on disposal of property, plant and equipment	587	1,909	711
Excess tax benefits from stock compensation	(1,466)
Other non-cash adjustments	(337)	(314)	621
Changes in operating assets and liabilities:
Accounts receivable	(10,844)	2,660	23,931
Inventories	(4,907)	11,376	125
Prepaid expenses and other assets	(213)	(405)	(19)
Accounts payable	3,731	(731)	(3,215)
Accrued expenses and other liabilities	15,173	16,784	(8,385)
Income taxes receivable/payable	1,518	(102)	(353)
Net cash provided by operating activities	45,208	60,443	33,847
Investing Activities
Expenditures for property, plant and equipment	(13,060)	(7,593)	(7,419)
Proceeds from sales of property, plant and equipment	176	3	28
Purchase of acquired company, net of cash acquired		(11)	(2,075)
Notes receivable, net	187	117	99
Net cash used in investing activities	(12,697)	(7,484)	(9,367)
Financing Activities
Financing costs	(119)	(750)	(135)
Restricted cash		37,000	(37,000)
Borrowings under line of credit	74,500	93,700
Principal payments under line of credit	(79,500)	(88,700)
Principal payments under mortgages and notes		(91,875)	(2,542)
Repurchases of convertible notes			(5,882)
Repurchases of common stock	(31,277)	(5,522)	(3,092)
Proceeds from employee stock purchase and option plans	4,032	821	1,427
Excess tax benefits from stock compensation	1,466
Net cash used in financing activities	(30,898)	(55,326)	(47,224)
Net increase (decrease) in cash and cash equivalents	1,613	(2,367)	(22,744)
Cash and cash equivalents at beginning of year	2,159	4,526	27,270
Cash and cash equivalents at end of year	3,772	2,159	4,526
Supplemental disclosures of cash flow information:
Cash paid for interest, net of capitalized interest	348	5,792	6,349
Cash paid for income taxes, net	$ 672	$ 590	$ 658