Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net income	$ 237,200,000	$ 209,400,000	$ 187,900,000
Reconciliation to net cash provided by operating activities:
Depreciation	76,400,000	71,200,000	59,300,000
Amortization of debt discount and deferred financing costs	1,100,000	1,600,000	2,100,000
Deferred income taxes	53,200,000	39,700,000	16,400,000
Stock-based compensation	17,900,000	17,200,000	18,900,000
Excess tax benefits on stock-based compensation	(9,200,000)	(5,800,000)	(5,300,000)
Equity in earnings from investments in affiliated companies	(2,000,000)	(1,400,000)	(1,300,000)
Changes in assets and liabilities:
(Increase) decrease in accounts receivable	(18,400,000)	(15,400,000)	6,400,000
Increase in inventories	(25,000,000)	(38,800,000)	(28,400,000)
(Increase) decrease in prepaid expenses and other current assets	(2,900,000)	4,100,000	(3,300,000)
(Decrease) increase in accounts payable and accrued liabilities	(11,600,000)	40,100,000	19,200,000
(Increase) decrease in non-current assets	(10,400,000)	(800,000)	900,000
(Decrease) increase in other, net	(5,300,000)	(3,100,000)	100,000
Net cash provided by operating activities	301,000,000	318,000,000	272,900,000
Cash flows from investing activities
Capital expenditures	(305,300,000)	(260,100,000)	(194,900,000)
Investments in affiliated companies		(10,300,000)
Net cash used for investing activities	(305,300,000)	(270,400,000)	(194,900,000)
Cash flows from financing activities
Issuance of senior notes	300,000,000
Borrowings from senior unsecured credit facility		481,000,000
Borrowings from senior secured credit facility		189,000,000	309,000,000
Repayment of senior secured credit facilities		(481,000,000)	(182,000,000)
Repayment of other debt, net	(1,200,000)	(1,700,000)	(3,800,000)
Deferred financing costs and discount related to long-term debt	(3,600,000)	(1,400,000)	(2,400,000)
Dividends paid on common stock	(38,300,000)	0	0
Repayment of senior unsecured credit facility	(135,000,000)	(66,000,000)
Purchase of common stock	(146,100,000)	(160,000,000)	(90,000,000)
Repayment of senior secured credit agreement — term loan			(85,000,000)
Activity under stock plans and other	13,300,000	3,200,000	7,000,000
Net cash used for financing activities	(10,900,000)	(36,900,000)	(47,200,000)
Effect of exchange rate changes on cash and cash equivalents	(3,900,000)	(5,300,000)	2,100,000
Net (decrease) increase in cash and cash equivalents	(19,100,000)	5,400,000	32,900,000
Cash and cash equivalents at beginning of year	70,900,000	65,500,000	32,600,000
Cash and cash equivalents at end of year	51,800,000	70,900,000	65,500,000
Supplemental cash flow information (See Note 14):
Accrual basis additions to property, plant and equipment	$ 289,000,000	$ 270,200,000	$ 206,500,000