Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Activities
Net income	$ 67,944	$ 87,927	$ 88,049
Depreciation and amortization	31,684	29,921	30,764
Pension expense	11,955	4,836	12,268
Net gain from investing activities—asset disposals	(1,745)	(2,094)	(436)
Stock-based compensation	7,599	9,053	10,337
Asset Impairment Charges	4,946	0	0
Deferred income tax provision	(1,699)	(5,388)	(3,234)
Other noncurrent assets and liabilities	(45,859)	(53,482)	(18,162)
Currency exchange losses, net	2,471	1,393	5,127
Excess tax benefit related to stock plans	(596)	(2,573)	(2,246)
Other, net	(2,786)	(5,168)	4,386
Operating cash flow before changes in certain working capital items	73,914	64,425	126,853
(Increase) in trade receivables	(21,959)	(23,480)	(13,171)
(Increase) in inventories	(9,403)	(600)	(6,296)
Increase in accounts payable and accrued liabilities	20,286	56,988	10,732
(Increase) decrease in income taxes receivable, prepaid expenses and other current assets	(7,584)	9,698	(7,337)
Changes in certain working capital items	(18,660)	42,606	(16,072)
Cash Flow From Operating Activities	55,254	107,031	110,781
Investing Activities
Capital expenditures	(36,241)	(33,583)	(36,517)
Property disposals	8,022	3,385	1,360
Acquisition of business, net of cash acquired	(180,271)	0	0
Other investing	0	(500)	0
Cash Flow From Investing Activities	(208,490)	(30,698)	(35,157)
Financing Activities
Proceeds from (payments on) short-term debt, net	5	(796)	662
Payments on long-term debt	(291,525)	(421,667)	(306,766)
Proceeds from long-term debt	510,456	406,000	295,100
Restricted cash	264	86	(2,790)
Cash dividends paid	(47,380)	(45,586)	(43,994)
Distributions to noncontrolling interests	0	0	(556)
Company stock purchases	(9,885)	(5,654)	(11,785)
Exercise of stock options	1,930	6,926	9,643
Employee stock purchase plan	488	0	0
Excess tax benefit related to stock plans	596	2,573	2,246
Cash Flow From Financing Activities	164,949	(58,118)	(58,240)
Effect of exchange rate changes on cash and equivalents	(11,786)	(8,482)	(3,837)
(Decrease) increase in cash and cash equivalents	(73)	9,733	13,547
Beginning cash and cash equivalents	105,998	96,265	82,718
Ending cash and cash equivalents	105,925	105,998	96,265
Supplemental cash flow information:
Interest payments	10,818	9,663	10,884
Income tax payments	$ 50,001	$ 31,679	$ 36,242