Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Available-for-sale securities before taxes: |
|
|
|
|
| Change in net unrealized gain/loss during the period |
$ (5,554)
|
$ 9,193
|
$ 23,763
|
$ 6,472
|
| Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income |
(455)
|
(92)
|
(926)
|
(1,105)
|
| Net unrealized gains (losses) |
(6,009)
|
9,101
|
22,837
|
5,367
|
| Available-for-sale securities taxes: |
|
|
|
|
| Change in net unrealized gain/loss during the period |
2,221
|
(3,678)
|
(9,503)
|
(2,589)
|
| Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income |
182
|
37
|
370
|
442
|
| Net unrealized gains (losses) |
2,403
|
(3,641)
|
(9,133)
|
(2,147)
|
| Available-for-sale securities net of taxes: |
|
|
|
|
| Change in net unrealized gain/loss during the period |
(3,333)
|
5,515
|
14,260
|
3,883
|
| Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income |
(273)
|
(55)
|
(556)
|
(663)
|
| Net unrealized gains (losses) |
(3,606)
|
5,460
|
13,704
|
3,220
|
| Employee benefit plans before taxes: |
|
|
|
|
| Net retirement plan gain due to curtailment |
|
|
|
(5,326)
|
| Net retirement plan gain (loss) |
|
|
|
1,950
|
| Amortization of net retirement plan actuarial gain (loss) |
335
|
201
|
1,004
|
1,663
|
| Amortization of net retirement plan prior service (credit) cost |
20
|
20
|
58
|
(351)
|
| Employee benefit plans |
355
|
221
|
1,062
|
(2,064)
|
| Other comprehensive income (loss) |
(5,654)
|
9,322
|
23,899
|
3,303
|
| Employee benefit plans taxes: |
|
|
|
|
| Net retirement plan gain due to curtailment |
|
|
|
2,130
|
| Net retirement plan gain (loss) |
|
|
|
(780)
|
| Amortization of net retirement plan actuarial gain |
(134)
|
(79)
|
(402)
|
(664)
|
| Amortization of net retirement plan prior service (credit) cost |
(8)
|
(9)
|
(23)
|
141
|
| Employee benefit plans |
(142)
|
(88)
|
(425)
|
827
|
| Other comprehensive income (loss) |
2,261
|
(3,729)
|
(9,558)
|
(1,320)
|
| Employee benefit plans net of taxes: |
|
|
|
|
| Net retirement plan gain due to curtailment |
|
|
0
|
(3,196)
|
| Net retirement plan gain (loss) |
|
|
0
|
1,170
|
| Amortization of net retirement plan actuarial gain |
201
|
122
|
602
|
999
|
| Amortization of net retirement plan prior service (credit) cost |
12
|
11
|
35
|
(210)
|
| Employee benefit plans |
213
|
133
|
637
|
(1,237)
|
| Other comprehensive income (loss) |
$ (3,393)
|
$ 5,593
|
$ 14,341
|
$ 1,983
|