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