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Accumulated Other Comprehensive Income (Loss) Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2018
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Adoption of ASU 2018-02 (see Note 4) |  | $ 5,345
Accumulated Other Comprehensive Income (Loss) |  |
Schedule of Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Adoption of ASU 2018-02 (see Note 4) | $ 5,000 | $ 5,345

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- Definition Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL116659650-108580 + Details
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