Employee Retirement Plans - FV Rollforward (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Reconciliation of the fair value measurements using significant unobservable inputs (Level 3) | ||
| Fair value of plan assets at beginning of year | $ 29,223 | |
| Fair value of plan assets at end of year | 33,903 | $ 29,223 |
| Level 3 | ||
| Reconciliation of the fair value measurements using significant unobservable inputs (Level 3) | ||
| Fair value of plan assets at beginning of year | 1,748 | 1,748 |
| Deposits | 100 | 101 |
| Actual return on plan assets held at reporting date | 142 | 138 |
| Withdrawls | 36 | 145 |
| Fair value of plan assets at end of year | 2,026 | 1,748 |
| Pension plan | ||
| Reconciliation of the fair value measurements using significant unobservable inputs (Level 3) | ||
| Fair value of plan assets at beginning of year | 29,223 | 26,378 |
| Fair value of plan assets at end of year | $ 33,903 | $ 29,223 |
| X | ||||||||||
- Definition Represents the increase in fair value of plan assets from deposits made during the period. No definition available.
|
| X | ||||||||||
- Definition Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of plan assets that relate to an irrevocable action that relieves the employer, or plan, of primary responsibility for a benefit obligation and eliminates risks related to the obligation and the assets used to effect settlement. Includes, but is not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified pension benefits and purchasing annuity contracts to cover vested benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|