Income Taxes (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax Cuts And Jobs Act of 2017, Impact Including Lower Tax Rate, On U.S. Income Tax Expense		$ 0.21
Tax Cuts and Jobs Act of 2017, Transition Tax for Accumulated Foreign Earnings, Provisional Income Tax Expense	$ 0
Income from continuing operations before income taxes and equity income
U.S.		(13,934,000)	$ 28,281,000	$ (9,235,000)
International		70,405,000	85,368,000	84,637,000
Income from continuing operations before income taxes and equity income		56,471,000	113,649,000	75,402,000
Currently payable:
U.S. federal		903,000	(7,000)	654,000
U.S. state		233,000	177,000	54,000
International		23,775,000	17,127,000	19,763,000
Total income taxes currently payable		24,911,000	17,297,000	20,471,000
Deferred U.S. federal		(5,924,000)	1,854,000	46,372,000
Deferred U.S. state		(1,303,000)	(10,911,000)	1,121,000
Deferred international		2,530,000	(2,741,000)	10,226,000
Total income tax expense from continuing operations		20,214,000	5,499,000	78,190,000
Cash payments for income taxes, including taxes on gain or loss from discontinued business		$ 115,600,000	$ 26,800,000	$ 24,900,000