Unaudited Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 16,205	$ 16,784
Adjustments to reconcile net income to net cash provided by operating activities:
Change in fair value of warrant liability	0	(2,649)
Depreciation and amortization	6,923	5,501
Amortization of deferred financing costs	12	530
Accretion of debt discount	55	2,031
Gain on sale of assets	(2,568)	(2,475)
Stock compensation expense	5,820	5,877
Deferred income tax provision	(422)	746
Excess tax benefit related to share-based awards	(432)	(518)
Non-cash loss on extinguishment of debt	0	4,270
Changes in current assets and liabilities:
Restricted cash	150	0
Accounts receivable, net	(2,540)	2,175
Inventories	(5,970)	(3,089)
Other current assets	2,045	(2,321)
Accounts payable	(8,293)	(1,992)
Accrued liabilities	1,043	604
Income taxes payable	(638)	(2,397)
Interest payable	93	(1,004)
Net cash provided by operating activities	11,483	22,073
Cash flows from investing activities:
Capital expenditures	(9,119)	(9,478)
Proceeds from sale of assets	3,026	2,618
Payments for acquisition, net of cash acquired	(53,396)	0
Purchase of patents and other intangible assets	0	(29)
Net cash used in investing activities	(59,489)	(6,889)
Cash flows from financing activities:
Repayments of indebtedness	(7,649)	(51,535)
Proceeds of borrowings	26,190	0
Borrowings on revolving credit facility	153,571	0
Repayments on revolving credit facility	(116,014)	0
Debt issuance costs	(991)	0
Issuance costs of preferred stock and detachable warrants	(200)	0
Excess tax benefit related to share-based awards	432	518
Purchase of treasury stock	(4,859)	(490)
Proceeds from sale of common stock	352	0
Proceeds from exercise of stock options	128	131
Proceeds from the exercise of stock warrants	6	263
Net cash provided by (used in) financing activities	50,966	(51,113)
Effect of changes in exchange rates on cash and cash equivalents	(157)	(28)
Net increase (decrease) in cash and cash equivalents	2,803	(35,957)
Cash and cash equivalents at the beginning of period	2,700	46,682
Cash and cash equivalents at the end of period	$ 5,503	$ 10,725