Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 993	$ 35,011
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	10,527	10,287
Stock-based compensation expense	2,964	2,840
Provision for deferred income taxes	1,775	(13,108)
Net provision for doubtful accounts	721	173
Gain on sale of a business		(33,974)
(Gain) loss on sale of assets	11	(362)
Excess tax benefit from stock-based compensation	(16)
Change in assets and liabilities:
(Increase) decrease in receivables	45,869	(1,080)
(Increase) decrease in inventories	7,620	(9,229)
Increase in other assets	(265)	(3,858)
Decrease in accounts payable	(29,353)	(1,248)
Increase (decrease) in accrued liabilities and other	(9,250)	18,142
Net cash provided by operating activities	31,596	3,594
Cash flows from investing activities:
Capital expenditures	(18,505)	(18,509)
Proceeds from sale of property, plant and equipment	298	754
Proceeds from sale of a business		89,167
Net cash (used in) provided by investing activities	(18,207)	71,412
Cash flows from financing activities:
Borrowings on lines of credit	1,906	47,562
Payments on lines of credit	(2,394)	(45,113)
Debt issuance costs	(1,456)
Other financing activities	(12)	(13)
Proceeds from employee stock plans	305	34
Purchases of treasury stock		(13,123)
Excess tax benefit from stock-based compensation	16
Net cash used in financing activities	(1,635)	(10,653)
Effect of exchange rate changes on cash	(5,114)	(6)
Net increase in cash and cash equivalents	6,640	64,347
Cash and cash equivalents at beginning of year	85,052	65,840
Cash and cash equivalents at end of period	91,692	130,187
Cash paid for:
Income taxes (net of refunds)	4,846	9,500
Interest	$ 661	$ 667