Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings before provision for income taxes and discontinued operations [Abstract]
Domestic	$ 464,145	$ 448,301	$ 344,793
Foreign	377,589	394,708	380,585
Earnings before provision for income taxes and discontinued operations	841,734	843,009	725,378
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. Federal	79,305	71,069	47,445
State and local	13,312	16,709	14,120
Foreign	97,106	102,284	86,523
Total current - continuing	189,723	190,062	148,088
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
U.S. Federal	2,777	(6,033)	876
State and local	(10,526)	1,770	626
Foreign	(23,691)	(20,708)	(15,357)
Total deferred - continuing	(31,440)	(24,971)	(13,855)
Total expense - continuing	$ 158,283	$ 165,091	$ 134,233
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
U.S. Federal income tax rate	21.00%	21.00%	21.00%
State and local taxes, net of Federal income tax benefit	1.70%	1.70%	1.60%
Foreign operations tax effect	(0.80%)	(1.30%)	(1.10%)
SAB 118	0.00%	0.00%	(0.60%)
Foreign tax credits	0.00%	(0.10%)	(0.30%)
Foreign Derived Intangible Income	(1.10%)	(1.00%)	(0.80%)
Share awards	(1.20%)	(1.70%)	(2.00%)
Disposition of businesses	0.00%	1.20%	0.00%
Other	(0.80%)	(0.20%)	0.70%
Effective rate from continuing operations	18.80%	19.60%	18.50%
U.S. Tax Reform [Abstract]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount			$ 4,200
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	0.00%	0.00%	0.60%

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