Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense	$ 0	$ 0
Income from continuing operations before income taxes and equity income
U.S.	69,125,000	5,694,000	$ (99,939,000)
International	88,129,000	89,757,000	20,468,000
Income (loss) from continuing operations before income taxes and equity income	157,254,000	95,451,000	(79,471,000)
Currently payable:
U.S. federal	281,000	4,107,000	(4,088,000)
U.S. state	1,127,000	372,000	365,000
International	18,014,000	21,975,000	18,014,000
Total income taxes currently payable	19,422,000	26,454,000	14,291,000
Deferred U.S. federal	7,164,000	46,470,000	(8,195,000)
Deferred U.S. state	(11,045,000)	1,142,000	2,238,000
Deferred international	(2,642,000)	9,737,000	(1,697,000)
Total income tax expense	12,899,000	83,803,000	6,637,000
Cash payments for income taxes, including taxes on gain or loss from discontinued business	$ 26,800,000	$ 24,900,000	$ 14,600,000
Tax Cuts and Jobs Act of 2017, GILTI Provision Impact on Effective Tax Rate	0.25%