Share Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation And Expense Information [Abstract]
Total Cost Of Share Based Payment Plans	$ 13,957,000	$ 15,835,000	$ 21,688,000
Amounts capitalized in fixed costs	4,190,000	5,079,000	7,769,000
Amounts charged against income, before income tax benefit	9,767,000	10,756,000	13,919,000
Amount of related income tax benefit recognized in income	$ 4,083,000	$ 4,463,000	$ 4,997,000