Retirement Plans (Narrative) (Details)
$ in Thousands |
12 Months Ended |
|
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
item
|
Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Defined benefit plan, fair value of plan assets |
|
$ 10,419
|
$ 11,290
|
$ 10,851
|
$ 9,754
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
|
$ 10,120
|
$ 10,948
|
|
|
| Favorable rate of return equal to or greater than average inflation rate |
|
5.00%
|
|
|
|
| Investment objective achievement period |
|
60 years
|
|
|
|
| Single stock issue restricted among total portfolio value |
|
5.00%
|
|
|
|
| Securities held in mutual or commingled funds |
|
90.00%
|
|
|
|
| Expected return on plan assets |
|
6.50%
|
6.50%
|
6.50%
|
|
| Net periodic pension cost |
|
$ (80)
|
$ (4)
|
$ 385
|
|
| Interest cost on projected benefit obligation |
|
518
|
532
|
505
|
|
| Defined benefit plan, expected return on plan assets |
|
$ (701)
|
(698)
|
(615)
|
|
| Defined contribution plan, number of separate plans | item |
|
2
|
|
|
|
| Defined contribution plan, employer discretionary contribution amount |
|
$ 300
|
300
|
$ 300
|
|
| Scenario, Forecast for 2016 [Member] |
|
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Net periodic pension cost |
$ (21)
|
|
|
|
|
| Interest cost on projected benefit obligation |
512
|
|
|
|
|
| Defined benefit plan, expected return on plan assets |
(645)
|
|
|
|
|
| Defined benefit plan, amortization of losses (gains) |
$ 112
|
|
|
|
|
| Cash and Cash Equivalents [Member] |
|
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Defined benefit plan, fair value of plan assets |
|
300
|
400
|
|
|
| Bonds and Notes [Member] |
|
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Defined benefit plan, fair value of plan assets |
|
3,400
|
|
|
|
| Equity Securities [Member] |
|
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Defined benefit plan, fair value of plan assets |
|
6,700
|
|
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
|
$ 6,697
|
$ 7,230
|
|
|
| Defined benefit plan, target plan asset allocations range, minimum |
|
45.00%
|
|
|
|
| Defined benefit plan, target plan asset allocations range, maximum |
|
75.00%
|
|
|
|
| Standard Commercial P & C Business Unit [Member] |
|
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Minimum hours of service to participate within defined benefit plan |
|
1000 hours
|
|
|
|