Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows provided by (used in) operating activities:
Net income	$ 51,157	$ 59,886
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	83,327	73,019
Rationalization charges	3,923	6,108
Stock compensation expense	7,202	6,428
Loss on early extinguishment of debt	7,052	0
Other changes that provided (used) cash, net of effects from acquisition:
Trade accounts receivable, net	(118,516)	(111,600)
Inventories	(134,374)	(176,427)
Trade accounts payable	(27,554)	(10,701)
Accrued liabilities	(2,101)	(14,431)
Other, net	(8,923)	5,067
Net cash used in operating activities	(138,807)	(162,651)
Cash flows provided by (used in) investing activities:
Purchase of business, net of cash acquired	(1,022,092)	0
Capital expenditures	(81,287)	(111,714)
Proceeds from asset sales	477	8,822
Net cash used in investing activities	(1,102,902)	(102,892)
Cash flows provided by (used in) financing activities:
Borrowings under revolving loans	992,436	531,544
Repayments under revolving loans	(559,050)	(114,207)
Proceeds from issuance of long-term debt	1,789,200	0
Repayments of long-term debt	(744,416)	(6,380)
Changes in outstanding checks - principally vendors	(78,941)	(101,765)
Dividends paid on common stock	(20,253)	(20,913)
Debt issuance costs	(16,643)	0
Repurchase of common stock	(3,231)	(2,214)
Net cash provided by financing activities	1,359,102	286,065
Cash and cash equivalents:
Net increase	117,393	20,522
Balance at beginning of year	24,690	99,945
Balance at end of period	142,083	120,467
Interest paid, net	35,686	32,269
Income taxes paid, net	$ 33,260	$ 43,707