CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating Activities:
Net income	$ 175,263	$ 141,402
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	26,431	22,861
Amortization of debt issuance costs	1,898	3,838
Amortization of debt discount	2,208	1,850
Deferred income taxes	21,934	7,702
Stock-based compensation expense	11,722	12,360
Loss on sale of property, buildings and equipment	439	171
Excess tax benefit from stock-based compensation	(5,560)	(3,523)
Interest related to uncertain tax positions	(3,288)	1,581
Changes in assets and liabilities
Trade and other receivables, net	(64,017)	(154,686)
Inventories, net	(16,028)	(44,155)
Prepaid expenses and other current assets	9,129	(998)
Accounts payable	38,540	110,550
Accrued payroll and benefit costs	(15,403)	(2,686)
Other current and noncurrent liabilities	6,415	(24,439)
Net cash provided by operating activities	189,683	71,828
Investing Activities:
Capital expenditures	(19,469)	(23,966)
Acquisition payments, net of cash acquired	(201,123)	(8,166)
Proceeds from sale of assets	51	86
Net cash used in investing activities	(220,541)	(32,046)
Financing Activities:
Proceeds from issuance of short-term debt	21,388	0
Repayments of short-term debt	(2,129)	0
Proceeds from issuance of long-term debt	740,450	464,981
Repayments of long-term debt	(691,202)	(464,900)
Debt issuance costs	(137)	(4,248)
Proceeds from the exercise of stock options	208	210
Excess tax benefit from stock-based compensation	5,560	3,523
Repurchase of common stock	(8,237)	(6,250)
(Decrease) increase in bank overdrafts	10,192	12,999
Payments on capital lease obligations	(1,702)	(1,110)
Net cash (used in) provided by financing activities	74,391	5,205
Effect of exchange rate on cash and cash equivalents	235	(4,515)
Net change in cash and cash equivalents	43,768	40,472
Cash and cash equivalents at the beginning of the period	63,869	53,577
Cash and cash equivalents at the end of the period	107,637
Non-cash investing and financing activities:
Property, buildings and equipment acquired through capital leases	2,693	210
Issuance of treasury stock	$ 0	$ 960