|
Long-Term Incentive Plan (Unit-based Awards) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
|
12 Months Ended |
|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding |
|
|
| Outstanding at beginning of period |
75,529 |
|
| Granted |
188,946 |
|
| Forfeited |
(12,009) |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period |
(51,334) |
|
| Outstanding at end of period |
201,132 |
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price |
$ 20.80 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price |
$ 18.28 |
|
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price |
$ 20.89 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price |
$ 19.73 |
$ 17.62 |