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Retirement Plans (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Retirement Benefits [Abstract] |  |  |
Automatic Annual Contribution Employees Hired Before January 1, 2009 Benefit Reduction Under Certain Amendments Minimum, percent | 5.00% |  |
Automatic Annual Contribution Employees Hired Before January 1, 2009 Due Benefit Reduction Under Certain Amendments Maximum, percent | 7.00% |  |
Employer's matching contribution to 401(k) of employees hired on or after January 1, 2009, percent | 50.00% |  |
Maximum annual contribution per employee, percent | 3.00% |  |
Funding and administrative costs of noncontributory defined benefit retirement plan and 401(k) plan [Abstract] |  |  |
401(k) plan | $ 143 | $ 110 |
Qualified noncontributory defined benefit retirement plan [Member] |  |  |
Funding and administrative costs of noncontributory defined benefit retirement plan and 401(k) plan [Abstract] |  |  |
Qualified noncontributory defined benefit retirement plan | 256 | 261 |
Components of net periodic pension cost [Abstract] |  |  |
Service cost | 0 | 0 |
Interest cost | 18 | 17 |
Amortization of unrecognized net loss | 0 | 4 |
Net periodic pension cost | 18 | $ 21 |
Recognized in accumulated other comprehensive income [Abstract] |  |  |
Net actuarial (gain) loss | 0 |  | $ 88
Past service cost | 0 |  | 0
Total recognized, net of tax | $ 0 |  | $ 88

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- Definition Amount, after 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 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 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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