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Employee Benefit Plans - Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Retirement Benefits, Description [Abstract] |  |
Unamortized net actuarial gain (loss) | $ 47 | $ (186)
Deferred tax (expense) benefit at 21% in 2018 and 35% in 2017 | (10) | 65
Reclassification adjustment for effect of enacted tax law changes | 0 | (26)
Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss) | 37 | $ (147)
Portion to Be Recognized in Income in 2019 |  |
Unamortized net actuarial gain (loss) | (160) |
Deferred tax (expense) benefit at 21% in 2018 and 35% in 2017 | 34 |
Reclassification adjustment for effect of enacted tax law changes | 0 |
Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss) | $ (126) |

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- Definition Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI for Change in Enacted Tax + References No definition available. + Details
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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + 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 (j) -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 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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