Stock-Based Compensation and Other Employee Benefit Plans (Summary of Stock Options) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended				9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2013
Outstanding Stock Options, Activity [Roll Forward]
Options outstanding, vested, beginning balance					1,043,825
Exercised					(498,123)
Canceled/forfeited					(35,000)
Options outstanding, vested, ending balance	510,702		1,043,825		510,702
Outstanding Stock Options, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, vested, beginning balance					$ 10.50
Canceled/forfeited					$ 7.74
Weighted average exercise price, vested, ending balance	$ 11.27		$ 10.50		$ 11.27
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options exercisable	510,702				510,702
Options exercisable, weighted average exercise price	$ 11.27				$ 11.27
Options outstanding, vested, weighted average remaining contractual life	2 years 2 months 9 days		2 years 3 months 29 days
Options exercisable, weighted average remaining contractual life	2 years 2 months 9 days
Options outstanding, aggregate intrinsic value, vested	$ 9.7	[1]	$ 15.1	[1]	$ 9.7	[1]
Options exercisable, aggregate intrinsic value, vested	$ 9.7	[1]			$ 9.7	[1]
Employee Stock Option [Member]
Outstanding Stock Options, Activity [Roll Forward]
Exercised					(498,123)
Outstanding Stock Options, Weighted Average Exercise Price [Roll Forward]
Exercised					$ 9.91

[1] Amount represents the difference between the exercise price and the market price of the Company’s stock on the last trading day of the corresponding period, multiplied by the number of in-the-money options.