Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net earnings	$ 65,581	$ 50,511
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	29,033	28,515
Provision for losses on accounts receivable	3,387	546
Write-downs of inventories	6,319	4,875
Write-off of computer software development costs	1,390
Non-cash stock-based compensation	5,579	5,139
Excess tax benefit from employee gains on stock-based compensation	(1,569)	(912)
Deferred income taxes	7,683	11,762
Changes in assets and liabilities:
Decrease in accounts receivable	230,630	143,709
Decrease (increase) in inventories	1,901	(32,676)
Decrease (increase) in other current assets	21,021	(6,558)
Increase in other assets	(2,169)	(1,557)
Decrease in accounts payable	(281,221)	(110,705)
Decrease in deferred revenue	(30,937)	(11,414)
Decrease in accrued expenses and other liabilities	(46,566)	(43,727)
Net cash provided by operating activities	10,062	37,508
Cash flows from investing activities:
Payment of additional purchase price consideration for Calence		(5,123)
Purchases of property and equipment	(16,883)	(12,631)
Net cash used in investing activities	(16,883)	(17,754)
Cash flows from financing activities:
Borrowings on senior revolving credit facility	971,000	910,136
Repayments on senior revolving credit facility	(905,500)	(892,636)
Borrowings on accounts receivable securitization financing facility	40,000	45,000
Repayments on accounts receivable securitization financing facility	(40,000)	(45,000)
Payments on capital lease obligation	(746)	(681)
Net repayments under inventory financing facility	(33,214)	(9,952)
Payment of deferred financing fees		(490)
Proceeds from sales of common stock under employee stock plans	38	49
Excess tax benefit from employee gains on stock-based compensation	1,569	912
Payment of payroll taxes on stock-based compensation through shares withheld	(2,544)	(1,260)
Repurchases of common stock	(50,000)
Net cash (used in) provided by financing activities	(19,397)	6,078
Foreign currency exchange effect on cash flows	1,135	(134)
(Decrease) increase in cash and cash equivalents	(25,083)	25,698
Cash and cash equivalents at beginning of period	123,763	68,066
Cash and cash equivalents at end of period	$ 98,680	$ 93,764