Stock-Based Compensation and Other Employee Benefit Plans (Schedule of Activity, Restricted Shares) (Details) - 6 months ended Jun. 30, 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)	62,568
Vested (in shares)	(188,113)
Canceled/forfeited (in shares)	(16,074)
Non-vested restricted shares, ending balance (in shares)	1,273,026
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)	18.94
Vested (in dollars per share)	18.27
Canceled/forfeited (in dollars per share)	30.87
Non-vested restricted shares, per share weighted average grant date fair value, ending balance (in dollars per share)	$ 25.97