Retirement Plans (Schedule of Fair Value, Assets Measured on Recurring Basis) (Details) - USD ($)
$ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
$ 10,120
|
$ 10,948
|
| Debt Securities [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
3,423
|
3,718
|
| Equity Securities [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
6,697
|
7,230
|
| Fair Value, Inputs, Level 1 [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
6,697
|
7,230
|
| Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
6,697
|
7,230
|
| Fair Value, Inputs, Level 2 [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
3,423
|
3,718
|
| Fair Value, Inputs, Level 2 [Member] | Debt Securities [Member] |
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
| Defined benefit plan, fair value of plan assets, excluding cash and cash equivalents |
$ 3,423
|
$ 3,718
|