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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Tax Disclosure [Abstract]        
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest $ 69,002 $ 71,076 $ 160,749 $ 150,847
Provision for income taxes (Note J) $ 15,886 $ 14,757 $ 36,257 $ 32,885
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent 23.00% 20.80% 22.60% 21.80%