Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net income	$ 249,800,000	$ 237,200,000	$ 209,400,000
Reconciliation to net cash provided by operating activities:
Depreciation and amortization	93,300,000	76,400,000	71,200,000
Amortization of deferred financing costs and debt discount	1,700,000	1,100,000	1,600,000
Deferred income taxes	62,800,000	53,200,000	39,700,000
Stock-based compensation	16,100,000	17,900,000	17,200,000
Equity in earnings from affiliated companies	(2,500,000)	(2,000,000)	(1,400,000)
Excess tax benefits on stock-based compensation		(9,200,000)	(5,800,000)
Changes in assets and liabilities:
Increase in accounts receivable	(17,400,000)	(18,400,000)	(15,400,000)
Decrease (increase) in inventories	10,800,000	(25,000,000)	(38,800,000)
(Increase) decrease in prepaid expenses and other current assets	(4,100,000)	(2,900,000)	4,100,000
(Increase) decrease in other non-current assets	(13,700,000)	(11,600,000)	40,100,000
Decrease in accounts payable/accrued liabilities	(7,900,000)	(10,400,000)	(800,000)
Increase (decrease) in other non-current liabilities	8,100,000	4,300,000	(2,000,000)
Other – net	4,400,000	(9,600,000)	(1,100,000)
Net cash provided by operating activities	401,400,000	301,000,000	318,000,000
Cash flows from investing activities
Capital expenditures	(327,900,000)	(305,300,000)	(260,100,000)
Investments in affiliated companies	(30,000,000)		(10,300,000)
Acquisition	(8,600,000)
Net cash used for investing activities	(366,500,000)	(305,300,000)	(270,400,000)
Cash flows from financing activities
Proceeds from issuance of senior notes		300,000,000
Proceeds from senior unsecured credit facility	78,000,000		481,000,000
Repayment of senior unsecured credit facility		(135,000,000)	(66,000,000)
Proceeds from Euro facility	26,400,000
Proceeds from previous senior secured credit facility			189,000,000
Repayment of previous senior secured credit facility			(481,000,000)
Proceeds (repayment) of other debt, net	1,100,000	(1,200,000)	(1,700,000)
Deferred financing costs and discount related to long-term debt	(1,700,000)	(3,600,000)	(1,400,000)
Dividends paid	(39,800,000)	(38,300,000)	0
Repurchase of stock	(111,100,000)	(146,100,000)	(160,000,000)
Activity under stock plans	300,000	13,300,000	3,200,000
Net cash used for financing activities	(46,800,000)	(10,900,000)	(36,900,000)
Effect of exchange rate changes on cash and cash equivalents	(4,700,000)	(3,900,000)	(5,300,000)
Net (decrease) increase in cash and cash equivalents	(16,600,000)	(19,100,000)	5,400,000
Cash and cash equivalents at beginning of period	51,800,000	70,900,000	65,500,000
Cash and cash equivalents at end of period	35,200,000	51,800,000	70,900,000
Supplemental data:
Accrual basis additions to property, plant and equipment	$ 320,200,000	$ 289,000,000	$ 270,200,000