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)	$ 9,743	$ 1,079	$ (104,129)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	29,126	28,252	28,269
Deferred income taxes	(924)	744	(8,349)
Income from discontinued operations	(451)	(262)	(679)
Restructuring charges	3,782	4,222	14,054
Impairment charges		302	116,863
Losses (gains) on dispositions of property and other assets	(42)	45	(18)
Share-based compensation expense	4,413	3,518	3,093
Excess tax benefit from share-based compensation arrangements	(54)	(27)
Other non-cash items, net	4,659	4,580	6,714
Change in operating assets and liabilities (excluding the impact of acquisitions):
Receivables	(18,092)	(3,042)	5,834
Inventories	3,729	6,148	7,493
Accounts payable	4,372	4,637	(15,623)
Restructuring liabilities	(3,888)	(6,718)	(7,587)
Accrued compensation	4,563	6,966	(17,620)
Customer deposits	4,950	2,000	(1,600)
Income taxes payable	(2,694)	(1,264)	(4,660)
Other assets and liabilities, net	(8,456)	(7,897)	(28,302)
Net cash provided by (used in) operating activities	34,736	43,283	(6,247)
Cash flows from investing activities
Capital expenditures	(21,538)	(17,040)	(21,315)
Acquisition of businesses, net of cash acquired	(41,105)
Proceeds from dispositions of property and other assets	440	14,753	76
Net cash used in investing activities	(62,203)	(2,287)	(21,239)
Cash flows from financing activities
Payments on debt and capital lease obligations	(7,375)	(4,900)	(3,715)
Dividends paid on common stock	(3,241)	(3,275)	(3,292)
Common stock purchased for treasury	(5,230)	(6,906)	(1,233)
Debt issuance costs	(1,001)		(277)
Excess tax benefits from share-based compensation arrangements	54	27
Proceeds from exercise of stock options	296	593
Net cash used in financing activities	(16,497)	(14,461)	(8,517)
Effect of exchange rate changes on cash and cash equivalents	(1,501)	2,964	4,305
Net change in cash and cash equivalents	(45,465)	29,499	(31,698)
Cash and cash equivalents, beginning of year	145,841	116,342	148,040
Cash and cash equivalents, end of year	100,376	145,841	116,342
Supplemental disclosure of cash flow information
Cash paid for income taxes	10,213	7,931	10,158
Cash paid for interest	1,088	1,131	1,309
Equipment acquired under capital leases	$ 1,327	$ 963	$ 3,511