Stock-Based Compensation and Other Employee Benefit Plans (Schedule of Activity, Restricted Shares) (Details) - Restricted Shares [Member] - Common Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Restricted Shares
Non-vested restricted shares, beginning balance (in shares)	1,123,545	782,281
Granted (in shares)	972,754	431,346
Vested (in shares)	(659,212)	(68,122)
Canceled/forfeited (in shares)	(22,442)	(21,960)
Non-vested restricted shares, ending balance (in shares)	1,414,645	1,123,545
Per Share Weighted Average Grant Date Fair Value
Non-vested restricted shares, per share weighted average grant date fair value, beginning balance (in dollars per share)	$ 23.78	$ 19.10
Granted (in dollars per share)	26.88	31.04
Vested (in dollars per share)	25.27	18.83
Canceled/forfeited (in dollars per share)	17.38	14.93
Non-vested restricted shares, per share weighted average grant date fair value, ending balance (in dollars per share)	$ 25.32	$ 23.78