Employee Benefit Plans (Components of the Net Periodic Pension Plan Cost) (SERP) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 76 | $ 84 | $ 152 | $ 168 |
| Interest cost | 435 | 387 | 870 | 774 |
| Amortization of prior service cost | 3 | 3 | 6 | 6 |
| Net pension expense/(credit) included in employee benefits | 18 | (86) | 71 | (174) |
| SERP [Member] | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 24 | 29 | 49 | 58 |
| Interest cost | 63 | 58 | 125 | 116 |
| Amortization of recognized (gain)/ loss | 20 | 12 | 39 | 24 |
| Amortization of prior service cost | 5 | 5 | 10 | 10 |
| Net pension expense/(credit) included in employee benefits | $ 112 | $ 104 | $ 223 | $ 208 |