Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Net Income |
$ 24,662
|
$ 23,360
|
$ 21,795
|
| Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |
(1,208)
|
(2,961)
|
3,500
|
| Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |
402
|
168
|
589
|
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent |
(806)
|
(2,793)
|
4,089
|
| Comprehensive Income (Loss), Net of Tax |
23,856
|
20,567
|
25,884
|
| Accumulated Net Unrealized Investment Gain (Loss) [Member] |
|
|
|
| Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |
(1,832)
|
232
|
(2,925)
|
| Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |
(78)
|
(67)
|
(326)
|
| Accumulated Defined Benefit Plans Adjustment, Net Unamortized Gain (Loss) [Member] |
|
|
|
| Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |
848
|
(2,846)
|
6,425
|
| Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |
514
|
288
|
914
|
| Accumulated Defined Benefit Plans Adjustment, Net Prior Service Cost (Credit) [Member] |
|
|
|
| Other Comprehensive Income (Loss), before Reclassifications, Net of Tax |
(224)
|
(347)
|
0
|
| Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax |
$ (34)
|
$ (53)
|
$ 1
|