Income Taxes (Schedule Of Components Of Provision For Income Taxes) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Federal	$ 26,400,000	$ 3,300,000	$ 1,100,000
Foreign	100,000
State and local	1,300,000	3,300,000	1,000,000
Total current income tax expense	27,800,000	6,600,000	2,100,000
Federal	36,300,000	54,700,000	5,500,000
Foreign	(1,700,000)
State and local, net of valuation provisions	5,700,000	2,300,000	800,000
Total deferred income tax expense	40,300,000	57,000,000	6,300,000
Provision for income taxes	$ 68,055,000	$ 63,613,000	$ 8,385,000
Effective income tax rate	39.10%	41.30%	10.60%