Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows provided by (used in) operating activities:
Net income	$ 145,866	$ 158,755
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	109,790	114,211
Rationalization charges	10,754	4,978
Loss on early extinguishment of debt	0	1,474
Excess tax benefit from stock-based compensation	(680)	(3,403)
Other changes that provided (used) cash, net of effects from acquisitions:
Trade accounts receivable, net	(325,281)	(291,837)
Inventories	(43,721)	(81,553)
Trade accounts payable	8,555	26,698
Accrued liabilities	22,272	43,040
Other, net	24,268	(24,909)
Net cash used in operating activities	(48,177)	(52,546)
Cash flows provided by (used in) investing activities:
Purchases of businesses, net of cash acquired	(690)	(17,714)
Capital expenditures	(151,419)	(94,290)
Proceeds from asset sales	225	1,202
Net cash used in investing activities	(151,884)	(110,802)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	692,476	757,960
Repayments under revolving loans	(326,026)	(434,950)
Proceeds from issuance of long-term debt	7,327	732,215
Repayments of long-term debt	(7,040)	(753,168)
Debt issuance costs	0	(5,019)
Changes in outstanding checks - principally vendors	(82,801)	(86,538)
Dividends paid on common stock	(29,919)	(29,007)
Excess tax benefit from stock-based compensation	680	3,403
Repurchase of common stock under stock plan	(2,892)	(11,456)
Repurchase of common stock under share repurchase authorization	(170,132)	(24,666)
Net cash provided by financing activities	81,673	148,774
Cash and cash equivalents:
Net decrease	(118,388)	(14,574)
Balance at beginning of year	222,591	160,463
Balance at end of period	104,203	145,889
Interest paid, net	45,541	49,632
Income taxes paid, net	$ 37,546	$ 40,093