|
Employee Benefits (Details 2) (Restricted Stock, USD $)
|
12 Months Ended |
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
Restricted Stock
|
|
|
|
| Summary of restricted stock activity [Rollforward] |
|
|
|
| Number of shares, Nonvested, Beginning (in shares) |
501,280 |
486,447 |
144,078 |
| Number of shares, Granted (in shares) |
5,682 |
116,705 |
407,712 |
| Number of shares, Vested (in shares) |
(162,381) |
(101,872) |
(65,343) |
| Number of shares, Forfeited (in shares) |
(66,000) |
0 |
0 |
| Number of shares, Nonvested, Ending (in shares) |
278,581 |
501,280 |
486,447 |
| Summary of restricted stock activity, weighted average grant-date fair value [Roll Forward] |
|
|
|
| Weighted Average Grant-Date Fair Value, Nonvested, Beginning (in dollars per share) |
$ 7.67 |
$ 5.86 |
$ 4.50 |
| Weighted Average Grant-Date Fair Value, Granted (in dollars per share) |
$ 15.43 |
$ 13.38 |
$ 6.21 |
| Weighted Average Grant-Date Fair Value, Vested (in dollars per share) |
$ 7.45 |
$ 5.48 |
$ 5.10 |
| Weighted Average Grant-Date Fair Value, Forfeited (in dollars per share) |
$ 5.99 |
$ 0.00 |
$ 0.00 |
| Weighted Average Grant-Date Fair Value, Nonvested, Ending (in dollars per share) |
$ 8.13 |
$ 7.67 |
$ 5.86 |