CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Cash Flows From Operating Activities:
Net income (loss)	[1]	$ 63,852	$ (44,342)		$ 112,115
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		33,289	33,532		32,381	[1]
Amortization of intangible assets		12,238	15,143		8,623	[1]
Share-based compensation		10,202	7,895		8,195	[1]
(Gain) loss on the disposition of property, plant and equipment		(20,965)	1,959		1,155	[1]
Amortization of capitalized financing costs		681	875		859	[1]
Excess tax cost (benefit) related to share-based compensation		1,034	(479)		(1,214)	[1]
Loss on disposition of business	[1]				8,234
Loss on sale of equity investment			33
Asset impairment charge			155,603
Deferred income taxes		(10,624)	(23,162)		(10,879)	[1]
Pension settlement charge		12,510
Changes in operating assets and liabilities (net of acquisitions):
Decrease (increase) in accounts receivable, net		38,499	(9,986)		(16,529)	[1]
Decrease (increase) in inventory		47,148	(12,467)		(18,724)	[1]
Increase in other assets		(12,631)	(5,313)		(2,898)	[1]
(Decrease) increase in accounts payable		(47,262)	41,329		(40,725)	[1]
Increase in accrued liabilities		17,534	1,077		1,276	[1]
(Decrease) increase in other liabilities		(14,563)	1,037		(4,736)	[1]
Net cash provided by operating activities		130,942	162,734		77,133	[1]
Cash Flows From Investing Activities:
Capital expenditures		(37,709)	(28,325)		(24,994)	[1]
Proceeds from the disposition of property, plant and equipment		33,940	153		2,767	[1]
Proceeds from the disposition of a subsidiary			146
Acquisitions, net of cash acquired			(40,515)		(161,406)	[1]
Sale of equity investment			612
Net cash used in investing activities		(3,769)	(67,929)		(183,633)	[1]
Cash Flows From Financing Activities:
Net (repayment) borrowings under revolving credit facility		(108,052)	4,577		155,911	[1]
Borrowings under Receivables Securitization Program	[1]				9,300
Repayment of debt	[1]				(135,000)
Proceeds from the issuance of debt	[1]				150,000
Net proceeds (disbursements) from share-based compensation arrangements		554	(770)		(2,863)	[1]
Acquisition of treasury stock, at cost		(6,839)	(68,055)		(49,982)	[1]
Payment of cash dividends		(20,487)	(21,185)		(21,789)	[1]
Excess tax (cost) benefits related to share-based compensation		(1,034)	479		1,214	[1]
Payment of debt issuance costs		(106)	(36)		(823)	[1]
Net cash (used in) provided by financing activities		(135,964)	(84,990)		105,968	[1]
Effect of exchange rate changes on cash and cash equivalents		137	(644)		(982)	[1]
Net change in cash and cash equivalents		(8,654)	9,171		(1,514)	[1]
Cash and cash equivalents, beginning of period		29,983	20,812	[1]	22,326	[1]
Cash and cash equivalents, end of period		21,329	29,983		20,812	[1]
Cash Paid During the Year For:
Interest		22,901	19,275		12,822	[1]
Income tax payments, net		$ 32,151	$ 76,330		$ 76,205	[1]

[1] Revised in 2015 for the impact of the changes in accounting principle related to inventory accounting.