Stock-Based Compensation and Other Employee Benefit Plans (Schedule of Activity, Stock Options) (Details) - USD ($) $ / shares in Units, $ in Millions					12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Weighted Average Remaining Contractual Life and Aggregate Intrinsic Value
Options outstanding, vested, weighted average remaining contractual life (in years)		6 months 18 days	1 year 3 months 15 days	1 year 11 months 16 days
Options outstanding, vested, aggregate intrinsic value (in dollars)	[1]	$ 0.9	$ 3.0	$ 10.7	$ 0.9	$ 3.0	$ 10.7
Options exercisable, weighted average remaining contractual life (in years)		6 months 18 days	1 year 3 months 15 days	1 year 11 months 16 days
Options exercisable, aggregate intrinsic value (in dollars)	[1]	$ 0.9	$ 3.0	$ 10.7	$ 0.9	$ 3.0	$ 10.7
Common Stock [Member]
Stock Options
Options outstanding, vested, beginning balance (in shares)					284,671	495,571
Options exercisable, beginning balance (in shares)					284,671	495,571
Exercised (in shares)					(81,971)	(210,900)	(513,254)
Canceled/forfeited (in shares)					0	0
Options outstanding, vested, ending balance (in shares)		202,700	284,671	495,571	202,700	284,671	495,571
Options exercisable, ending balance (in shares)		202,700	284,671	495,571	202,700	284,671	495,571
Per Share Weighted Average Exercise Price
Options outstanding, vested, per share weighted average exercise price, beginning balance (in dollars per share)					$ 12.06	$ 11.17
Options exercisable, per share weighted average exercise price, beginning balance (in dollars per share)					12.06	11.17
Options outstanding, vested, per share weighted average exercise price, ending balance (in dollars per share)		$ 13.06	$ 12.06	$ 11.17	13.06	12.06	$ 11.17
Options exercisable, per share weighted average exercise price, ending balance (in dollars per share)		$ 13.06	$ 12.06	$ 11.17	13.06	12.06	$ 11.17
Common Stock [Member] | Stock Options [Member]
Per Share Weighted Average Exercise Price
Exercised (in dollars per share)					$ 9.60	$ 9.97

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