Stock-Based Compensation and Other Employee Benefit Plans (Summary of Activity, Stock Options) (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended			6 Months Ended
	Jun. 30, 2014		Dec. 31, 2013	Jun. 30, 2014		Dec. 31, 2013
Outstanding Stock Options, Activity [Roll Forward]
Options outstanding, vested, beginning balance	284,671		495,571	495,571
Exercised				(210,900)
Canceled/forfeited				0
Options outstanding, vested, ending balance	284,671			284,671
Outstanding Stock Options, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price, vested, beginning balance	$ 12.06		$ 11.17	$ 11.17
Canceled/forfeited				$ 0
Weighted average exercise price, vested, ending balance	$ 12.06			$ 12.06
Outstanding Stock Options, Additional Disclosures
Options exercisable	284,671			284,671
Options exercisable, weighted average exercise price	$ 12.06			$ 12.06
Options outstanding, vested, weighted average remaining contractual life	1 year 9 months 15 days		1 year 11 months 16 days
Options exercisable, weighted average remaining contractual life	1 year 9 months 15 days
Options outstanding, vested, aggregate intrinsic value	$ 5.3	[1]		$ 5.3	[1]	$ 10.7	[1]
Options exercisable, aggregate intrinsic value	$ 5.3	[1]		$ 5.3	[1]
Employee Stock Option [Member]
Outstanding Stock Options, Weighted Average Exercise Price [Roll Forward]
Exercised				$ 9.97

[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.