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Employee Benefit Plans (Schedule of Net Period Benefit Cost and Other Amounts Recognized in Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Changes in funded status recognized in other comprehensive loss, before taxes |  |  |  |
Total recognized in OCI, before taxes |  | $ 1,671 | $ (2,332) | $ 1,803
Supplemental Executive Retirement Plan [Member] |  |  |  |
Net period benefit cost |  |  |  |
Service cost | [1] | 395 | 446 | 335
Interest cost | [2] | 523 | 488 | 452
Recognized net actuarial loss(2) | [2] | 240 | 561 | 246
Net periodic benefit cost |  | 1,158 | 1,495 | 1,033
Changes in funded status recognized in other comprehensive loss, before taxes |  |  |  |
Net actuarial loss (gain) arising during period |  | 1,524 | (1,534) | 1,955
Amortization of net unrecognized actuarial loss |  | (240) | (561) | (246)
Total recognized in OCI, before taxes |  | 1,284 | (2,095) | 1,709
Total recognized in net periodic benefit cost and OCI, before taxes |  | 2,442 | (600) | 2,742
Other Postretirement Benefits Plan [Member] |  |  |  |
Net period benefit cost |  |  |  |
Service cost | [1] | 48 | 46 | 53
Interest cost | [2] | 148 | 132 | 144
Recognized net actuarial loss(2) | [2] | 31 | 52 | 40
Amortization of prior service credit(2) | [2] | (24) | (24) | (24)
Net periodic benefit cost |  | 203 | 206 | 213
Changes in funded status recognized in other comprehensive loss, before taxes |  |  |  |
Net actuarial loss (gain) arising during period |  | 394 | (209) | 110
Amortization of net unrecognized actuarial loss |  | (31) | (52) | (40)
Amortization of prior service credit |  | 24 | 24 | 24
Total recognized in OCI, before taxes |  | 387 | (237) | 94
Total recognized in net periodic benefit cost and OCI, before taxes |  | $ 590 | $ (31) | $ 307
[1] | (1)Presented in salaries and employee benefits on the consolidated statements of income.
[2] | (2)Presented in other expenses on the consolidated statements of income.

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- Definition Amount recognized in net periodic benefit cost (credit) and other comprehensive (income) loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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) recognized in net periodic benefit (cost) credit of defined benefit 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 (h)(4) -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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + Details
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(5) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit 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 (h)(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 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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