Stock-Based Compensation and Other Employee Benefit Plans (Schedule of Activity, Restricted Shares) (Details) - Common Stock [Member]	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Restricted Shares [Member]
Restricted Shares
Non-vested restricted shares, beginning balance (in shares)	1,970,586	[1]
Granted (in shares)	188,843
Vested (in shares)	(300,633)
Canceled/forfeited (in shares)	(17,400)
Non-vested restricted shares, ending balance (in shares)	1,841,396	[1]
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) | $ / shares	$ 21.61
Granted (in dollars per share) | $ / shares	39.44
Vested (in dollars per share) | $ / shares	40.73
Canceled/forfeited (in dollars per share) | $ / shares	16.57
Non-vested restricted shares, per share weighted average grant date fair value, ending balance (in dollars per share) | $ / shares	$ 20.36
Restricted Stock Units [Member]
Restricted Shares
Non-vested restricted shares, beginning balance (in shares)	43,300	[1]
Non-vested restricted shares, ending balance (in shares)	39,050	[1]

[1] Includes 39,050 and 43,300 restricted stock units as of June 30, 2017 and December 31, 2016, respectively.