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Other Liabilities (Narrative) (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 28, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018 | Aug. 29, 2014
Other Liabilities [Line Items] |  |  |  |  |  |  |
Accrued pension liability |  | $ 4,671,000 |  | $ 4,671,000 |  | $ 4,670,000 | $ 7,500,000
Service cost |  | 0 | $ 0 | 0 | $ 0 |  |
Interest cost |  | 298,000 | 45,000 | 343,000 | 90,000 |  |
Actuarial loss (gain) |  | 52,000 | $ 52,000 | 103,000 | $ 104,000 |  |
Benefit obligation |  | $ 10,200,000 |  | $ 10,200,000 |  |  |
Discount rate |  | 4.25% |  | 4.25% |  |  |
Discount term |  |  |  | 15 years |  |  |
Monthly estate payment amount |  | $ 57,000 |  | $ 57,000 |  |  |
Discounted value |  | 2,700,000 |  | 2,700,000 |  |  |
Accumulated prior service cost |  | 3,100,000 |  | $ 3,100,000 |  |  |
Accumulated prior service cost amortization period |  |  |  | 15 years |  |  |
Accrued pension costs included in other liabilities |  | $ 5,400,000 |  | $ 5,400,000 |  |  |
Payment related to annuity | $ 2,400,000 |  |  |  |  |  |
Payment period |  |  |  | 42 months |  |  |
Supplemental Executive Retirement Plans [Member] |  |  |  |  |  |  |
Other Liabilities [Line Items] |  |  |  |  |  |  |
Accrued pension liability |  |  |  |  |  |  | $ 7,600,000

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