Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings before provision for income taxes and discontinued operations [Abstract]
Domestic	$ 620,908	$ 420,546	$ 530,268
Foreign	352,935	268,786	270,342
Earnings before provision for income taxes and discontinued operations	973,843	689,332	800,610
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. Federal	277,979	139,117	115,130
State and local	24,444	21,213	11,706
Foreign	47,152	85,273	79,982
Total current - continuing	349,575	245,603	206,818
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. Federal	(187,365)	(14,438)	19,238
State and local	(3,514)	(1,232)	(3,433)
Foreign	3,482	(49,493)	(17,894)
Total deferred - continuing	(187,397)	(65,163)	(2,089)
Total expense - continuing	$ 162,178	$ 180,440	$ 204,729
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
U.S. Federal income tax rate	35.00%	35.00%	35.00%
State and local taxes, net of Federal income tax benefit	1.30%	1.90%	1.60%
Foreign operations tax effect	(6.50%)	(7.10%)	(4.30%)
Domestic manufacturing deduction	(2.00%)	(2.20%)	(3.00%)
Foreign tax credits	(0.00%)	(0.10%)	(2.40%)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	(5.60%)	(1.40%)	0.00%
Effective Income Tax Rate Reconciliation, Disposition of Business, Percent	(3.80%)	(0.60%)	0.00%
Other, principally non-tax deductible items	(1.70%)	0.70%	(1.30%)
Effective rate from continuing operations	16.70%	26.20%	25.60%
U.S. Tax Reform [Abstract]
Deferred tax provisional benefit	$ 172,000
Income tax payable deemed repatriation	115,000
Estimated cash to repatriate	450,000
Tax withholding on repatriation	$ 11,000