Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income (loss)	$ 31,408	$ (43,465)	$ (50,333)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	10,105	13,768	14,186
Amortization of deferred financing costs	3,126	3,914	1,552
Accretion of debt discount	5,295	4,946	4,798
Change in fair value of warrant liability	(9,571)	21,464	(465)
Provision for doubtful accounts	661	94	45
Gain on sale of assets	(3,378)	(1,261)	(1,365)
Impairment of goodwill, intangible assets or fixed assets		9,288	18,500
Stock compensation expense	7,437	4,684	1,731
Reduction in (excess) tax benefit related to share-based awards	(570)	1,744	195
Deferred income tax provision (benefit)	1,218	(3,611)	10,500
Unrealized gain on interest rate swap			(199)
Loss on extinguishment of debt	3,225	995
Change in current assets and liabilities:
Restricted cash		(140)	(1)
Accounts receivable	(17,918)	(12,792)	22,548
Inventories	(10,043)	(613)	10,795
Income taxes, net	7,563	3,634	(6,607)
Accounts payable	5,041	5,499	(14,645)
Other current assets	(892)	(170)	449
Accrued liabilities	(255)	4,608	(9,768)
Interest payable	(29)	(487)	270
Net cash provided by operating activities	32,423	12,099	2,186
Cash flows from investing activities:
Capital expenditures	(9,984)	(6,060)	(6,555)
Proceeds from sale of assets	5,286	5,460	2,858
Purchase of patents and other intangible assets	(244)		(2)
Net cash used in investing activities	(4,942)	(600)	(3,699)
Cash flows from financing activities:
Repayments of indebtedness	(33,273)	(38,572)	(27,764)
Proceeds from the sale of common stock	29,438
Proceeds from exercise of warrants	4,793	4,453
Debt issuance costs	(1,421)	(2,004)	(819)
Purchase of treasury stock	(775)	(236)	(48)
Excess (reduction in) tax benefit related to share-based awards	570	(1,744)	(195)
Proceeds from exercise of stock options	147	3	30
Proceeds from borrowings		40,000	21,807
Proceeds from preferred stock offering			16,000
Issuance costs of preferred stock and detachable warrants			(1,199)
Net cash (used in) provided by financing activities	(521)	1,900	7,812
Effect of exchange rate changes on cash and cash equivalents	(141)	(21)	(7)
Net increase in cash and cash equivalents	26,819	13,378	6,292
Cash and cash equivalents at the beginning of year	19,863	6,485	193
Cash and cash equivalents at the end of year	$ 46,682	$ 19,863	$ 6,485