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Employee Benefit Plans - Textual (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target Allocation |  | 100.00% |
Estimate of net actuarial losses reclassified from AOCI in the next fiscal year |  | $ 555 | $ (1,336)
Other comprehensive loss, before reclassifications, net of tax |  | (6,119) | (1,206)
Current employer pension plan contributions |  | 1,228 | $ 1,920
Scenario, Forecast [Member] | Reclassification out of Accumulated Other Comprehensive Income [Domain] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Estimate of net actuarial losses reclassified from AOCI in the next fiscal year | $ 266 |  |
Other comprehensive loss, before reclassifications, net of tax | $ 266 |  |
Pension Plan, Defined Benefit |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Current employer pension plan contributions |  | 1,228 |
Expected pension plan contribution |  | $ 1,156 |

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