Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 815	$ 9,621
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,959	6,971
Deferred income taxes	5,558	4,925
Restructuring charges	2,225	269
Losses (gains) on dispositions of property and other assets	(3)	6
Share-based compensation expense	1,217	933
Excess tax benefit from share-based compensation arrangements	(269)	(54)
Other non-cash items, net	1,375	1,050
Change in operating assets and liabilities:
Receivables	(16,313)	(35,587)
Inventories	(2,151)	5,325
Accounts payable	16,925	31,665
Restructuring liabilities	(809)	(1,625)
Accrued compensation	(6,438)	131
Customer deposits	(5,405)	(2,461)
Income taxes payable	496	663
Other assets and liabilities, net	(1,397)	(1,488)
Net cash provided by operating activities	2,785	20,344
Cash flows from investing activities:
Capital expenditures	(7,548)	(7,677)
Acquisition of businesses, net of cash acquired	(23,546)	(10,496)
Proceeds from dispositions of property and other assets	9	224
Net cash used in investing activities	(31,085)	(17,949)
Cash flows from financing activities:
Payments on debt and capital lease obligations	(669)	(714)
Dividends paid on common stock	(813)	(815)
Common stock purchased for treasury	(1,000)	(668)
Excess tax benefit from share-based compensation arrangements	269	54
Proceeds from exercise of stock options	89	163
Net cash used in financing activities	(2,124)	(1,980)
Effect of exchange rate changes on cash and cash equivalents	1,655	2,100
Net increase (decrease) in cash and cash equivalents	(28,769)	2,515
Cash and cash equivalents, beginning of year	100,376	145,841
Cash and cash equivalents, end of period	71,607	148,356
Supplemental disclosure of cash flow information
Cash paid for income taxes	1,809	3,500
Cash paid for interest	286	185
Equipment acquired under capital leases	$ 186	$ 517