Income Taxes (Schedule of Provision for Income Taxes) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2014	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal						$ 47,300	$ 77,000	$ 48,700
Foreign						3,900	1,700	300
State and local						6,600	10,900	12,400
Total current income tax expense						57,800	89,600	61,400
Deferred:
Federal						14,900	500	15,200
Foreign						2,700	(1,500)	1,100
State and local						1,000	3,900	(1,600)
Total deferred income tax expense			$ 3,281	$ 11,160	$ 4,294	13,756	6,533	5,127
Provision for income taxes	$ 30,319	$ 20,761	$ 7,489	$ 28,250	$ 58,569	76,429	92,542	76,080
Continuing Operations [Member]
Deferred:
Total deferred income tax expense						$ 18,600	$ 2,900	$ 14,700