Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings from Continuing Operations before Income Taxes [Abstract]
United States	$ 165,719	$ 143,924	$ 124,500
Foreign	141,384	135,141	151,457
Earnings before income taxes	307,103	279,065	275,957
Current tax expense (benefit):
Federal	17,900	112,673	36,771
State	5,980	5,035	5,785
Foreign	(16,008)	19,689	64,109
Current income tax expense (benefit)	7,872	137,397	106,665
Deferred tax expense (benefit):
Federal	1,273	34,857	1,404
State	235	473	267
Foreign	15,298	(885)	995
Deferred income taxes	14,604	25,968	5,613
Deferred Income Tax Expense (Benefit), Excluding Discontinued Operations	16,806	34,445	2,666
Total provision	$ 24,678	$ 171,842	$ 109,331