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, 2015	Dec. 31, 2014
Restricted Shares
Non-vested restricted shares, beginning balance (in shares)	1,414,645	1,123,545
Granted (in shares)	706,761	972,754
Vested (in shares)	(446,874)	(659,212)
Canceled/forfeited (in shares)	(44,300)	(22,442)
Non-vested restricted shares, ending balance (in shares)	1,630,232	1,414,645
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	$ 23.78
Granted (in dollars per share)	17.27	26.88
Vested (in dollars per share)	21.24	25.27
Canceled/forfeited (in dollars per share)	26.11	17.38
Non-vested restricted shares, per share weighted average grant date fair value, ending balance (in dollars per share)	$ 22.94	$ 25.32