Equity Compensation - Performance Share Activity (Details) - Performance shares and performance share units - $ / shares
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
|
|
|
| Stock / Units unvested at beginning of period (in shares) |
198,401
|
121,644
|
0
|
| Granted (in shares) |
234,402
|
114,257
|
152,800
|
| Vested (in shares) |
0
|
0
|
0
|
| Canceled (in shares) |
(123,335)
|
(37,500)
|
(31,156)
|
| Stock / Units unvested at end of period (in shares) |
309,468
|
198,401
|
121,644
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |
|
|
|
| Stock / Units unvested at beginning of period - Weighted Average Fair Value (in dollars per share) |
$ 19.50
|
$ 20.05
|
$ 0.00
|
| Granted - Weighted Average Fair Value (in dollars per share) |
12.82
|
18.95
|
20.05
|
| Vested - Weighted Average Fair Value (in dollars per share) |
0
|
0.00
|
0.00
|
| Canceled - Weighted Average Fair Value (in dollars per share) |
19.14
|
19.62
|
20.05
|
| Stock / Units unvested at end of period - Weighted Average Fair Value (in dollars per share) |
$ 14.58
|
$ 19.50
|
$ 20.05
|