Income Taxes (Reconciliation Of The Statutory Federal Income Tax With The Company's Effective Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Statutory rate									$ 101,778	$ 64,831	$ 80,413
State income taxes, net of federal income tax									14,860	11,433	11,766
Change in valuation allowance									(2,433)	1,659	(55)
True-up									(2,956)
Investment in subsidiary										(58,153)
Non-taxable book gain										(2,647)
Revaluation of deferred taxes										(2,290)	(8,450)
Other, net									415	(2,511)	777
Provision for income taxes/(benefit)	$ 23,890	$ 25,673	$ 31,946	$ 30,155	$ 25,863	$ (43,921)	$ 21,659	$ 8,722	$ 111,664	$ 12,322	$ 84,451