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Benefit Plans (Changes in the defined benefit pension plan) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Change in benefit obligation |  |  |
Benefit obligation, January 1 | $ 9,412 | $ 11,381 |
Interest cost | 378 | 388 | $ 444
Actuarial (gain) loss | 1,216 | (1,194) |
Defined Benefit Plan, Benefit Obligation, Benefits Paid | 797 | 1,163 |
Benefit obligation, December 31 | 10,209 | 9,412 | 11,381
Change in plan assets |  |  |
Fair value of plan assets, January 1 | 7,765 | 9,469 |
Investment return | 1,384 | (541) |
Contributions | 0 | 0 |
Defined Benefit Plan, Plan Assets, Benefits Paid | 797 | 1,163 |
Fair value of plan assets, December 31 | 8,352 | 7,765 | 9,469
Deficiency in funded status at December31, included on the consolidated balance sheets in accrued interest payable and other liabilities | (1,857) | (1,647) |
Accrued benefit cost at January 1 | (1,647) | (1,912) |
Contributions | 0 | 0 |
Net periodic cost for the year | (268) | (345) | (412)
Net change in unrecognized actuarial loss and prior service cost | 58 | 610 | 423
Accrued benefit cost at December 31 | $ (1,857) | $ (1,647) | $ (1,912)

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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + 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 (b)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(6) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964 + Details
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