Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating activities:
Net income	$ 29,076	$ 22,752
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,122	20,782
Amortization of convertible debt discount	0	731
(Gain) loss on disposition of property, plant and equipment	(1,334)	78
Stock compensation expense	2,577	1,865
Withholding taxes paid on stock issuances	(488)	(463)
Changes in assets and liabilities:
Accounts receivable	(3,767)	(32,802)
Inventories	(6,229)	802
Prepaid expenses and other current assets	(5,780)	(2,763)
Accounts payable	9,921	9,676
Accrued liabilities	(13,493)	(3,131)
Deferred income taxes	3,740	3,834
Long-term retirement benefits	(2,878)	(4,964)
Other	2,374	580
Net cash provided by operating activities	32,841	16,977
Investing activities:
Proceeds from disposition of property, plant and equipment	2,010	382
Capital expenditures	(10,960)	(15,074)
Other	(321)	(467)
Net cash used by investing activities	(9,271)	(15,159)
Financing activities:
Net change in other borrowings	8,425	559
Payments on long-term debt	(55,821)	(26,151)
Proceeds from the issuance of long-term debt	26,722	39,283
Payment of assumed liability to Otto Männer Holding AG	0	(19,796)
Proceeds from the issuance of common stock	4,956	7,262
Common stock repurchases	0	(8,389)
Dividends paid	(6,571)	(5,971)
Excess tax benefit on stock awards	914	2,246
Other	(142)	(76)
Net cash used by financing activities	(21,517)	(11,033)
Effect of exchange rate changes on cash flows	(2,470)	(230)
Decrease in cash and cash equivalents	(417)	(9,445)
Cash and cash equivalents at beginning of period	46,039	70,856
Cash and cash equivalents at end of period	$ 45,622	$ 61,411