Equity-Based Compensation (Summary of Information about Restricted Stock Units and Weighted Average Grant Date Fair Value) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restricted shares
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period	21,485
Granted	3,185	21,318	21,721
Vested	(17,309)
Forfeited	0
Balance at end of period	7,361	21,485
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period	$ 17.59
Granted	29.30	$ 17.48	$ 16.76
Vested	19.65
Forfeited	0.00
Balance at end of period	$ 17.07	$ 17.59
Performance Shares
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period	396,714
Granted	0	396,714	0
Vested	0
Forfeited	0
Balance at end of period	396,714	396,714
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period	$ 19.78
Granted	0.00	$ 19.78	$ 0
Vested	0.00
Forfeited	0.00
Balance at end of period	$ 19.78	$ 19.78
Restricted stock units
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period	548,815
Granted	141,982	212,419	218,857
Vested	(131,369)
Forfeited	(23,264)
Balance at end of period	536,164	548,815
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period	$ 15.22
Granted	25.44	$ 17.78	$ 16.96
Vested	15.64
Forfeited	16.18
Balance at end of period	$ 17.79	$ 15.22
Deferred stock units
Restricted Stock Units / Restricted Stock (in shares)
Balance at beginning of period	0
Granted	11,945	0	0
Vested	0
Forfeited	0
Balance at end of period	11,945	0
Weighted Average Grant Date Fair Value (in dollars per share)
Balance at beginning of period	$ 0.00
Granted	29.30	$ 0.00	$ 0.00
Vested	0.00
Forfeited	0.00
Balance at end of period	$ 29.30	$ 0.00