Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities
Net income (loss)	$ 3,651	$ (638)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation	2,664	2,207
Amortization	320	444
Share-based compensation	2,101	1,892
Excess tax benefits from share-based compensation	(1,138)	(1,405)
Equity earnings in unconsolidated investments	(144)	(12)
Other	941	(1,192)
Changes in operating assets and liabilities, net of effects of acquisitions:
Receivables	(90,350)	(71,602)
Product inventories	(72,788)	(91,525)
Prepaid expenses and other assets	(1,395)	861
Accounts payable	140,530	133,674
Accrued expenses and other current liabilities	(18,419)	(9,832)
Net cash used in operating activities	(34,027)	(37,128)
Investing activities
Acquisition of businesses, net of cash acquired	(3,855)	0
Purchase of property and equipment, net of sale proceeds	(6,661)	(6,246)
Other investments	(53)	0
Net cash used in investing activities	(10,569)	(6,246)
Financing activities
Proceeds from revolving line of credit	215,411	167,257
Payments on revolving line of credit	(63,700)	(85,800)
Payments on long-term debt and other long-term liabilities	(100,005)	(89)
Excess tax benefits from share-based compensation	1,138	1,405
Proceeds from stock issued under share-based compensation plans	4,178	4,512
Payments of cash dividends	(6,668)	(6,321)
Purchases of treasury stock	(2,369)	(35,953)
Net cash provided by financing activities	47,985	45,011
Effect of exchange rate changes on cash and cash equivalents	(195)	62
Change in cash and cash equivalents	3,194	1,699
Cash and cash equivalents at beginning of period	17,487	9,721
Cash and cash equivalents at end of period	$ 20,681	$ 11,420