Accounting for Stock-Based Compensation (Schedule of Share-based Compensation, Restricted Stock, Activity) (Details) (Restricted Stock [Member], USD $)	3 Months Ended
	Jun. 30, 2014	Mar. 31, 2014
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Unvested Shares	2,729,605	1,607,489
Granted, Shares	36,000	1,943,000
Vested, Shares	(4,709)	(818,877)
Forfeited, Shares		(2,007)
Ending Balance, Unvested Shares	2,760,896	2,729,605
Beginning of Period, Weighted Average Grant Date Fair Value	$ 39.59	$ 35.13
Granted, Weighted Average Grant Date Fair Value	$ 38.26	$ 41.19
Vested, Weighted Average Grant Date Fair Value	$ 25.50	$ 34.65
Forfeited, Weighted Average Grant Date Fair Value		$ 34.82
End of Period, Weighted Average Grant Date Fair Value	$ 39.59	$ 39.59