Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings from Continuing Operations before Income Taxes [Abstract]
United States	$ 124,500	$ 146,940	$ 113,967
Foreign	151,457	158,506	135,562
Earnings before income taxes	275,957	305,446	249,529
Current tax expense (benefit):
Federal	36,771	35,029	30,224
State	5,785	6,074	5,511
Foreign	64,109	19,884	11,389
Current income tax expense (benefit)	106,665	60,987	47,124
Deferred tax expense (benefit):
Federal	1,404	10,752	1,207
State	267	1,052	(1,115)
Foreign	995	(9,031)	2,052
Deferred income taxes	5,613	2,863	(1,242)
Deferred Income Tax Expense (Benefit), Excluding Discontinued Operations	2,666	2,773	2,144
Total provision	$ 109,331	$ 63,760	$ 49,268