Income Taxes (Schedule of Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 77,400	$ 26,700	$ (6,000)
Foreign	6,200	9,400	11,500
State and local	15,600	10,500	(800)
Total current income tax expense	99,200	46,600	4,700
Deferred:
Federal	22,400	43,900	18,200
Foreign	(2,800)	3,300	(7,500)
State and local	(2,000)	12,300	7,600
Total deferred income tax expense	22,160	56,209	18,277
Provision for income taxes	116,843	106,072	22,942
Continuing Operations [Member]
Deferred:
Total deferred income tax expense	$ 17,600	$ 59,500	$ 18,300