|
Employee Benefits Plan (Details) (USD $)
In Thousands, unless otherwise specified
|
12 Months Ended |
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
| Pension Plan [Member] |
|
|
|
| Change in benefit obligation: |
|
|
|
| Benefit obligation, beginning of year |
$ 65,621 |
$ 70,652 |
|
| Service cost |
2,434 |
2,915 |
2,720 |
| Interest cost |
3,069 |
2,688 |
2,721 |
| Amendments |
(6,282) |
|
|
| Actuarial loss (gain) |
16,761 |
(8,203) |
|
| Benefits paid |
(2,465) |
(2,431) |
|
| Benefit obligation, end of year |
79,138 |
65,621 |
70,652 |
| Change in plan assets: |
|
|
|
| Fair value |
70,933 |
56,668 |
|
| Actual return (loss) on plan assets |
2,759 |
8,696 |
|
| Employer contributions |
|
8,000 |
|
| Benefits paid |
2,465 |
2,431 |
|
| Fair value |
71,227 |
70,933 |
56,668 |
| Unfunded Status |
(7,911) |
5,312 |
|
| Life and Healthcare Plan [Member] |
|
|
|
| Change in benefit obligation: |
|
|
|
| Benefit obligation, beginning of year |
8,448 |
9,324 |
|
| Service cost |
202 |
265 |
169 |
| Interest cost |
367 |
345 |
363 |
| Plan participants' contributions |
210 |
247 |
|
| Actuarial loss (gain) |
192 |
(1,168) |
|
| Benefits paid |
(492) |
(565) |
|
| Benefit obligation, end of year |
8,927 |
8,448 |
9,324 |
| Change in plan assets: |
|
|
|
| Plan participants'contributions |
210 |
247 |
|
| Employer contributions |
282 |
318 |
|
| Benefits paid |
492 |
565 |
|
| Unfunded Status |
(8,927) |
(8,448) |
|
| SERP Plan [Member] |
|
|
|
| Change in benefit obligation: |
|
|
|
| Benefit obligation, beginning of year |
17,282 |
17,791 |
|
| Service cost |
222 |
479 |
363 |
| Interest cost |
865 |
737 |
716 |
| Business combination |
|
1,378 |
|
| Actuarial loss (gain) |
4,992 |
(2,754) |
|
| Benefits paid |
(499) |
(349) |
|
| Benefit obligation, end of year |
22,862 |
17,282 |
17,791 |
| Change in plan assets: |
|
|
|
| Employer contributions |
499 |
349 |
|
| Benefits paid |
499 |
349 |
|
| Unfunded Status |
$ (22,862) |
$ (17,282) |
|