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Other Liabilities (Narrative) (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 18 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 29, 2014 | Feb. 28, 2018 | Mar. 31, 2021 | Mar. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2020
Other Liabilities [Line Items] |  |  |  |  |  |
Accrued pension liability | $ 7,500,000 |  | $ 3,940,000 |  |  | $ 4,048,000
Service cost |  |  | 0 | $ 0 | $ 0 |
Interest cost |  |  | 62,000 | 68,000 |  |
Actuarial loss (gain) |  |  | $ (52,000) | $ (52,000) |  |
Discount rate |  |  | 4.25% |  |  |
Discount term |  |  | 15 years |  |  |
Monthly estate payment amount |  |  | $ 57,000 |  |  |
Discounted value |  |  | 2,700,000 |  |  |
Accumulated prior service cost |  |  | $ 3,100,000 |  |  |
Accumulated prior service cost amortization period |  |  | 15 years |  |  |
Accrued pension costs included in other liabilities |  |  | $ 4,600,000 |  |  |
Payment related to annuity |  | $ 2,400,000 |  |  |  |
Payment period |  |  | 42 months |  |  |
Benefit obligation, gross | 10,200,000 |  | $ 10,200,000 |  |  |
Supplemental Executive Retirement Plans [Member] |  |  |  |  |  |
Other Liabilities [Line Items] |  |  |  |  |  |
Accrued pension liability | $ 7,600,000 |  |  |  |  |

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- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension plan. Excludes other postretirement benefit plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(15)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109237824&loc=d3e1703-114919 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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