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)	$ 80,017	$ 41,626	$ (20,573)
Adjustments to reconcile net income (loss) to net cash provided by operations:
Impairment charges		225	1,166
Depreciation and amortization	28,971	27,010	28,138
Stock-based compensation expense	4,535	3,876	3,437
Provision for deferred income taxes	26,783	18,030	(6,916)
Net provision for doubtful accounts	2,400	478	2,301
Loss (gain) on sale of assets	630	(257)	233
Change in assets and liabilities:
(Increase) decrease in receivables	(135,303)	(75,829)	89,340
(Increase) decrease in inventories	(48,129)	(8,085)	35,182
(Increase) decrease in other assets	(434)	1,898	(800)
Increase (decrease) in accounts payable	30,425	2,810	(28,710)
(Decrease) increase in accrued liabilities and other	(3,293)	19,694	(13,979)
Net cash (used in) provided by operating activities	(13,558)	31,476	88,819
Cash flows from investing activities:
Capital expenditures	(36,897)	(12,134)	(18,544)
Proceeds from sale of property, plant and equipment	522	1,585	1,400
Business acquisitions, net of cash acquired	(26,775)
Net cash used in investing activities	(63,150)	(10,549)	(17,144)
Cash flows from financing activities:
Borrowings on lines of credit	27,619	141,497	116,000
Payments on lines of credit	(9,951)	(231,613)	(171,701)
Principal payments on notes payable and long-term debt	(219)	(30,457)	(10,439)
Proceeds from senior notes, net of offering costs		167,756
Proceeds from employee stock plans	3,588	3,591	143
Post-closing payment for business acquisition	(2,055)
Purchase of treasury stock	(644)	(153)	(268)
Net cash provided by (used in) financing activities	18,338	50,621	(66,265)
Effect of exchange rate changes on cash	607	(72)	(2,128)
Net (decrease) increase in cash and cash equivalents	(57,763)	71,476	3,282
Cash and cash equivalents at beginning of year	83,010	11,534	8,252
Cash and cash equivalents at end of year	25,247	83,010	11,534
Cash paid for:
Income taxes (net of refunds)	29,675	7,395	5,179
Interest	$ 7,794	$ 7,956	$ 7,564