Employee Benefit Plans (Components of the Net Periodic Pension Plan Cost) (SERP) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 76 | $ 74 | $ 228 | $ 242 |
| Interest cost | 435 | 403 | 1,305 | 1,177 |
| Amortization of prior service cost | 3 | 3 | 9 | 9 |
| Net pension expense/(credit) included in employee benefits | 18 | (61) | 89 | (235) |
| SERP [Member] | ||||
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | 24 | 29 | 73 | 87 |
| Interest cost | 62 | 58 | 187 | 174 |
| Amortization of recognized (gain)/ loss | 20 | 13 | 59 | 37 |
| Amortization of prior service cost | 5 | 5 | 15 | 15 |
| Net pension expense/(credit) included in employee benefits | $ 111 | $ 105 | $ 334 | $ 313 |