Stock-Based Compensation and Other Employee Benefit Plans (Schedule of Activity, Restricted Shares) (Details) - 3 months ended Mar. 31, 2015 - Restricted Shares [Member] - Common Stock [Member] - $ / shares	Total
Restricted Shares
Non-vested restricted shares, beginning balance (in shares)	1,414,645
Granted (in shares)	17,798
Vested (in shares)	(140,593)
Canceled/forfeited (in shares)	(24)
Non-vested restricted shares, ending balance (in shares)	1,291,826
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)	$ 25.32
Granted (in dollars per share)	21.04
Vested (in dollars per share)	18.69
Canceled/forfeited (in dollars per share)	21.22
Non-vested restricted shares, per share weighted average grant date fair value, ending balance (in dollars per share)	$ 25.98