Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 9,707	$ (1,396)	$ 43,295	$ 45,080
Effective tax rate	36.00%	(1.00%)	32.00%	14.00%
Federal statutory rate			21.00%
Tax benefit from foreign operations	$ 5,500		$ 9,400
State and local income tax expense	2,600	$ 4,100	5,700	$ 7,300
Tax expense (benefit) from change in valuation allowance	2,900	25,000	5,600	25,000
Tax benefit relating to uncertain tax positions	(5,200)	$ (7,200)	(8,700)	$ (5,600)
Tax expense from foreign operations	1,400		2,900
Foreign tax credit carry forwards	32,200		32,200
Valuation allowance	30,600		30,600
Second component of tax deductible goodwill, net of tax	$ 700		$ 700