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Basis Of Presentation and Significant Accounting Policies (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) Subsidiary State | Dec. 31, 2019 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |
Number of title insurance subsidiaries | Subsidiary | 2 |
Number of States in which Entity operates | State | 21 |
Cost Method Investments, Original Cost | $ 8,700 | $ 7,900
Unrealized holding gains on available-for-sale securities | 4,500 | 3,100
Unrecognized prior service cost and unrecognized actuarial losses associated with postretirement benefit liabilities | $ 144 | $ 32
Potential claim payment period after policy issuance | 20 years |
Minimum |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |
Property and equipment useful life | 3 years |
Finite-Lived Intangible Asset, Useful Life | 1 year |
Maximum |  |
Organization, Consolidation and Presentation of Financial Statements [Line Items] |  |
Property and equipment useful life | 25 years |
Finite-Lived Intangible Asset, Useful Life | 30 years |
Lag time between Policy effective dates and transaction reporting dates | 100 days |

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- Definition Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580 + Details
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