Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows provided by (used in) operating activities:
Net income	$ 172,413	$ 182,391	$ 185,413
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	142,192	148,089	167,644
Amortization of debt issuance costs	4,156	4,202	4,556
Rationalization charges	14,407	14,481	11,987
Stock compensation expense	12,077	12,425	10,005
Loss on early extinguishment of debt	0	1,474	2,068
Deferred income tax (benefit) provision	(13,278)	38,756	7,125
Excess tax benefit from stock-based compensation	(359)	(3,256)	(460)
Other changes that provided (used) cash, net of effects from acquisitions:
Trade accounts receivable, net	12,287	3,652	20,387
Inventories	(97,576)	(54,002)	25,060
Trade accounts payable	43,822	86,357	604
Accrued liabilities	37,640	(8,336)	(31,501)
Other, net	7,625	(81,245)	(52,183)
Net cash provided by operating activities	335,406	344,988	350,705
Cash flows provided by (used in) investing activities:
Purchases of businesses, net of cash acquired	(690)	(17,714)	(281,667)
Capital expenditures	(237,302)	(140,429)	(103,136)
Proceeds from asset sales	903	1,273	8,389
Net cash used in investing activities	(237,089)	(156,870)	(376,414)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	732,091	781,022	940,013
Repayments under revolving loans	(729,843)	(805,565)	(917,661)
Changes in outstanding checks – principally vendors	18,961	(3,732)	13,097
Proceeds from issuance of long-term debt	7,538	733,629	304,981
Repayments of long-term debt	(37,304)	(754,834)	(308,257)
Debt issuance costs	0	(5,019)	(5,700)
Dividends paid on common stock	(39,741)	(38,624)	(36,202)
Excess tax benefit from stock-based compensation	359	3,256	460
Repurchase of common stock under stock plan	(2,892)	(11,457)	(2,560)
Repurchase of common stock under share repurchase authorization	(170,132)	(24,666)	(267,607)
Net cash used in financing activities	(220,963)	(125,990)	(279,436)
Cash and cash equivalents:
Net (decrease) increase	(122,646)	62,128	(305,145)
Balance at beginning of year	222,591	160,463	465,608
Balance at end of year	99,945	222,591	160,463
Interest paid, net	63,954	69,747	58,010
Income taxes paid, net of refunds	$ 49,690	$ 66,296	$ 114,213