Income Taxes Income Tax by Jurisdiction (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 75,830	$ 50,760	$ (69,850)
Income (Loss) from Continuing Operations before Income Taxes, Foreign	30,150	15,450	11,620
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	105,980	66,210	(58,230)
Current Federal Tax Expense (Benefit)	6,770	12,800	7,560
Current State and Local Tax Expense (Benefit)	2,440	1,770	1,920
Current Foreign Tax Expense (Benefit)	7,070	5,420	4,250
Current Income Tax Expense (Benefit)	16,280	19,990	13,730
Deferred Federal Income Tax Expense (Benefit)	4,540	15,180	(28,180)
Deferred State and Local Income Tax Expense (Benefit)	1,310	1,280	(2,550)
Deferred Foreign Income Tax Expense (Benefit)	550	(1,200)	(1,430)
Deferred Income Tax Expense (Benefit)	6,400	15,260	(32,160)
Income Tax Expense (Benefit), Continuing Operations	$ 22,680	$ 35,250	$ (18,430)