Equity Compensation - Options Activity (Details) - $ / shares
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |
|
|
|
| Options outstanding at beginning of period (in shares) |
2,942,783
|
3,600,132
|
4,533,782
|
| Granted (in shares) |
0
|
0
|
8,977
|
| Excercised (in shares) |
(1,250)
|
(172,218)
|
(33,810)
|
| Canceled (in shares) |
(398,801)
|
(485,131)
|
(908,817)
|
| Options outstanding at end of period (in shares) |
2,542,732
|
2,942,783
|
3,600,132
|
| Weighted Average Exercise Price |
|
|
|
| Options outstanding at beginning of period - Weighted Average Exercise Price (in dollars per share) |
$ 21.22
|
$ 22.74
|
$ 23.86
|
| Granted - Weighted Average Exercise Price (in dollars per share) |
0
|
0.00
|
16.71
|
| Excercised - Weighted Average Exercise Price (in dollars per share) |
13.82
|
13.95
|
14.16
|
| Canceled - Weighted Average Exercise Price (in dollars per share) |
21.47
|
34.98
|
28.57
|
| Options outstanding at end of period - Weighted Average Exercise Price (in dollars per share) |
$ 21.19
|
$ 21.22
|
$ 22.74
|
| Options exercisable at end of period (in shares) |
2,513,614
|
2,656,983
|
2,954,082
|
| Stock Options |
|
|
|
| Weighted Average Exercise Price |
|
|
|
| Options outstanding at end of period - Weighted Average Exercise Price (in dollars per share) |
$ 21.19
|
|
|
| Exercise price range, lower limit (in dollars per shares) |
13.37
|
$ 13.37
|
$ 13.35
|
| Exercise price range, upper limit (in dollars per shares) |
$ 33.36
|
$ 47.80
|
$ 47.80
|
| Options available for grant at end of period (in shares) |
3,891,121
|
2,659,562
|
3,654,426
|