Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income from continuing operations before income taxes and equity income
U.S.	$ (99,939)	$ 16,169	$ 22,951
International	20,468	18,646	(8,813)
Income (loss) from continuing operations before income taxes and equity income (loss)	(79,471)	34,815	14,138
Currently payable:
U.S. federal	(4,088)	408	5,622
U.S. state	365	546	557
International	18,014	23,095	14,569
Total income taxes currently payable	14,291	24,049	20,748
Deferred U.S. federal	(8,195)	2,651	3,447
Deferred U.S. state	2,238	812	893
Deferred international	(1,697)	166	5,278
Total income tax expense	6,637	27,678	30,366
Cash payments for income taxes, including taxes on gain or loss from discontinued business	$ 14,600	$ 18,900	$ 36,000