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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net earnings $ 18,598 $ 20,045
Adjustments to reconcile net earnings to net cash provided by operating activities:    
Depreciation and amortization 7,898 7,044
Increase (decrease) to allowance for doubtful accounts (55) 94
Increase to inventory reserves 1,573 1,092
Amortization of deferred gain on sale of building (524) (524)
Gain on disposal of property, plant and equipment (6) (7)
Equity income from joint ventures 0 (187)
Employee stock ownership plan allocation 1,933 1,257
Stock-based compensation 1,278 997
Decrease in deferred income taxes 3,965 10,401
Decrease in valuation allowance (294) 0
Loss on discontinued operations, net of tax 617 659
Change in assets and liabilities:    
Increase in accounts receivable (44,472) (45,783)
Decrease in inventories 3,300 7,442
Increase in prepaid expenses and other current assets (510) (13)
Increase in accounts payable 18,886 14,718
Increase in sundry payables and accrued expenses 9,629 15,257
Net changes in other assets and liabilities (633) (11,481)
Net cash provided by operating activities 21,183 21,011
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from the sale of property, plant and equipment 6 28
Divestiture of joint ventures 0 1,000
Divestiture of European distribution business 0 675
Capital expenditures (5,296) (4,557)
Acquisitions of businesses and assets, net of cash acquired (38,594) (26,984)
Net cash used in investing activities (43,884) (29,838)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Net borrowings under line-of-credit agreements 24,000 14,919
Principal payments of long-term debt and capital lease obligations (53) (12,344)
Increase in overdraft balances 5,766 9,591
Purchase of treasury stock (4,999) 0
Proceeds from exercise of employee stock options 307 145
Excess tax benefits related to the exercise of employee stock grants 4 15
Dividends paid (4,121) (3,186)
Net cash provided by financing activities 20,904 9,140
Effect of exchange rate changes on cash 168 646
Net increase (decrease) in cash and cash equivalents (1,629) 959
CASH AND CASH EQUIVALENTS at beginning of period 10,871 12,135
CASH AND CASH EQUIVALENTS at end of period 9,242 13,094
Cash paid during the year for:    
Interest 913 1,962
Income taxes $ 7,177 $ 6,616