Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
6 Months Ended |
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
| Available-for-sale securities before taxes: |
|
|
|
|
| Change in net unrealized gain/loss during the period |
$ 8,362
|
$ (12,041)
|
$ 29,317
|
$ (2,721)
|
| Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income |
(240)
|
(723)
|
(472)
|
(1,013)
|
| Net unrealized gains |
8,122
|
(12,764)
|
28,845
|
(3,734)
|
| Available-for-sale securities taxes: |
|
|
|
|
| Change in net unrealized gain/loss during the period |
(3,344)
|
4,817
|
(11,724)
|
1,089
|
| Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income |
96
|
289
|
189
|
405
|
| Net unrealized gains |
(3,248)
|
5,106
|
(11,535)
|
1,494
|
| Available-for-sale securities net of taxes: |
|
|
|
|
| Change in net unrealized gain/loss during the period |
5,018
|
(7,224)
|
17,593
|
(1,632)
|
| Reclassification adjustment for net realized gain on sale of available-for-sale securities included in net income |
(144)
|
(434)
|
(283)
|
(608)
|
| Net unrealized gains |
4,874
|
(7,658)
|
17,310
|
(2,240)
|
| Employee benefit plans before taxes: |
|
|
|
|
| Net retirement plan gain due to curtailment |
|
(5,326)
|
|
(5,326)
|
| Net retirement plan gain (loss) |
|
|
|
1,950
|
| Net retirement plan prior service credit |
|
1,950
|
|
|
| Amortization of net retirement plan actuarial gain (loss) |
326
|
729
|
669
|
1,462
|
| Amortization of net retirement plan prior service (credit) cost |
8
|
(190)
|
38
|
(369)
|
| Employee benefit plans |
334
|
(2,837)
|
707
|
(2,283)
|
| Other comprehensive income |
8,456
|
(15,601)
|
29,552
|
(6,017)
|
| Employee benefit plans taxes: |
|
|
|
|
| Net retirement plan gain due to curtailment |
|
2,130
|
|
2,130
|
| Net retirement plan gain (loss) |
|
|
|
(780)
|
| Net retirement plan prior service credit |
|
(780)
|
|
|
| Amortization of net retirement plan actuarial gain |
(131)
|
(290)
|
(268)
|
(585)
|
| Amortization of net retirement plan prior service (credit) cost |
(3)
|
76
|
(15)
|
148
|
| Employee benefit plans |
(134)
|
1,136
|
(283)
|
913
|
| Other comprehensive income |
(3,382)
|
6,242
|
(11,818)
|
2,407
|
| Employee benefit plans net of taxes: |
|
|
|
|
| Net retirement plan gain due to curtailment |
|
(3,196)
|
|
(3,196)
|
| Net retirement plan gain (loss) |
|
1,170
|
0
|
1,170
|
| Net retirement plan prior service credit |
|
1,170
|
|
|
| Amortization of net retirement plan actuarial gain |
195
|
439
|
401
|
877
|
| Amortization of net retirement plan prior service (credit) cost |
5
|
(114)
|
23
|
(221)
|
| Employee benefit plans |
200
|
(1,701)
|
424
|
(1,370)
|
| Other comprehensive income |
$ 5,074
|
$ (9,359)
|
$ 17,734
|
$ (3,610)
|