Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 35,134	$ 18,622
Adjustments to reconcile net income to net cash provided by (used in) operations:
Non-cash impairment charges		150
Depreciation and amortization	13,575	13,298
Stock-based compensation expense	2,065	1,930
Provision for deferred income taxes	9,997	9,402
Net provision for doubtful accounts	699	542
Gain on sale of assets	(117)	(189)
Change in assets and liabilities:
Increase in receivables	(32,334)	(54,167)
Increase in inventories	(1,981)	(4,132)
Increase in other assets	(5,729)	(558)
Increase in accounts payable	5,091	15,742
(Decrease) increase in accrued liabilities and other	(5,273)	7,162
Net cash provided by operating activities	21,127	7,802
Cash flows from investing activities:
Capital expenditures	(16,842)	(5,995)
Business acquisition, net of cash acquired	(25,601)
Proceeds from sale of property, plant and equipment	280	1,318
Net cash used in investing activities	(42,163)	(4,677)
Cash flows from financing activities:
Borrowings on lines of credit	2,256	99,027
Payments on lines of credit	(2,629)	(100,782)
Proceeds from employee stock plans	1,543	902
Purchase of treasury stock	(598)	(153)
Other financing activities	(22)	(305)
Net cash provided by (used in) financing activities	550	(1,311)
Effect of exchange rate changes on cash	1,780	(1,135)
Net (decrease) increase in cash and cash equivalents	(18,706)	679
Cash and cash equivalents at beginning of period	83,010	11,534
Cash and cash equivalents at end of period	64,304	12,213
Cash paid for:
Income taxes (net of refunds)	11,380	4,249
Interest	$ 3,602	$ 4,474