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Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Cash Flows from Operating Activities    
Net income $ 1,362 $ 8,409
(Loss) income from discontinued operations (87) 6,968
Income from continuing operations 1,449 1,441
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 6,563 5,891
Stock compensation expense 1,330 2,276
Non-cash charges to interest expense 393 564
Other non-cash adjustments 277 537
Increase (decrease) in cash resulting from changes in the following (excluding the effects of acquisitions):    
Accounts receivable (15,131) (24,132)
Inventories (7,964) (13,847)
Other current assets and other assets 2,057 7,714
Accounts payable 12,014 14,577
Accrued expenses and other non-current liabilities (14,037) (4,445)
Net cash used in operating activities of continuing operations (13,049) (9,424)
Net cash used in operating activities of discontinued operations (31) (3,086)
Net cash used in operating activities (13,080) (12,510)
Cash Flows from Investing Activities    
Purchases of property, plant, and equipment (2,743) (1,785)
Cash paid for acquisitions, net of cash received (2,705)  
Purchase of other investments   (250)
Net proceeds from sale of businesses   58,000
Net proceeds from sale of property and equipment 8 463
Net cash (used in) provided by investing activities (5,440) 56,428
Cash Flows from Financing Activities    
Purchase of treasury stock at market prices (888) (730)
Long-term debt payments (2)  
Net proceeds from issuance of common stock   10
Excess tax benefit from stock compensation 98  
Net cash used in financing activities (792) (720)
Effect of exchange rate changes on cash 522 440
Net (decrease) increase in cash and cash equivalents (18,790) 43,638
Cash and cash equivalents at beginning of year 54,117 60,866
Cash and cash equivalents at end of period $ 35,327 $ 104,504