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Investments in Securities and Fair Value (Tables)
 12 Months Ended
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of Gross Unrealized Gains (Losses) and Amortized Cost for Securities
The estimated fair value, gross unrealized holding gains, gross unrealized holding losses and amortized cost for fixed maturity securities by major classification are as follows:
As of December 31, 2021 (in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
Fixed maturity securities, available-for-sale, at fair value:
Government obligations
$— $— $— $— 
General obligations of U.S. states, territories and political subdivisions
16,669 922 — 17,591 
Special revenue issuer obligations of U.S. states, territories and political subdivisions
41,753 2,453 2 44,204 
Corporate debt securities17,089 955 48 17,996 
Total$75,511 $4,330 $50 $79,791 
As of December 31, 2020 (in thousands)Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
Fixed maturity securities, available-for-sale, at fair value:
Governmental obligations
$24,026 $57 $— $24,083 
General obligations of U.S. states, territories and political subdivisions
17,391 1,262 — 18,653 
Special revenue issuer obligations of U.S. states, territories and political subdivisions
44,939 3,270 3 48,206 
Corporate debt securities25,681 1,114 24 26,771 
Total$112,037 $5,703 $27 $117,713 
The cost and estimated fair value of equity securities are as follows:
As of December 31, 2021 (in thousands)CostEstimated
Fair
Value
Equity securities, at fair value:  
Common stocks$29,478 $76,853 
Total$29,478 $76,853 
As of December 31, 2020 (in thousands)CostEstimated
Fair
Value
Equity securities, at fair value:  
Common stocks$32,478 $64,919 
Total$32,478 $64,919 
Schedule Of Fixed Maturity Securities
The scheduled maturities of fixed maturity securities at December 31, 2021 are as follows:
Available-for-Sale
(in thousands)Amortized
Cost		Fair
Value
Due in one year or less$17,573 $17,736 
Due after one year through five years52,158 55,253 
Due after five years through ten years4,958 5,436 
Due after ten years822 1,366 
Total$75,511 $79,791 
Schedule of Unrealized Loss on Investments
The following table presents the gross unrealized losses on fixed maturity securities and the estimated fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous loss position at December 31, 2021 and 2020, respectively:
Less than 12 Months12 Months or LongerTotal
As of December 31, 2021 (in thousands)Estimated Fair ValueUnrealized LossesEstimated Fair ValueUnrealized LossesEstimated Fair ValueUnrealized Losses
Special revenue issuer obligations of U.S. states, territories and political subdivisions$— $— $1,102 $(2)$1,102 $(2)
Corporate debt securities8,493 (13)6,203 (35)14,696 (48)
Total temporarily impaired securities$8,493 $(13)$7,305 $(37)$15,798 $(50)
Less than 12 Months12 Months or LongerTotal
As of December 31, 2020 (in thousands)Estimated Fair ValueUnrealized LossesEstimated Fair ValueUnrealized LossesEstimated Fair ValueUnrealized Losses
Special revenue issuer obligations of U.S. states, territories and political subdivisions$— $— $1,103 $(3)$1,103 $(3)
Corporate debt securities20,630 (24)— — 20,630 (24)
Total temporarily impaired securities$20,630 $(24)$1,103 $(3)$21,733 $(27)
Schedule of Earnings on Investments
Earnings on investments for the years ended December 31 are as follows:
(in thousands)20212020
Fixed maturity securities$2,337 $2,688 
Equity securities1,413 1,569 
Invested cash and other short-term investments21 133 
Miscellaneous interest2 3 
Interest and dividends$3,773 $4,393 
Schedule of Gross Realized Gain (Loss) on Securities
Gross realized gains and losses on sales of investments for the years ended December 31 are summarized as follows:
(in thousands)20212020
Gross realized gains from securities:
Corporate debt securities$52 $30 
Common stocks1,900 3,428 
Total$1,952 $3,458 
Gross realized losses from securities:
Corporate debt securities$(33)$— 
Common stocks (1,008)(2,665)
Other-than-temporary impairment of securities— (482)
Total$(1,041)$(3,147)
Net realized gains from securities$911 $311 
Net realized other investment gains (losses):
Gains on other investments $958 $31 
Losses on other investments— (9)
Total$958 $22 
Net realized investment gains $1,869 $333 
Schedule of Variable Interest Entities The following table sets forth details about the Company's variable interest investments in VIEs, which are structured either as limited partnerships ("LPs") or LLCs, as of December 31, 2021:
Type of Investment (in thousands) Balance Sheet ClassificationCarrying ValueEstimated Fair ValueMaximum Potential Loss *
Tax credit LPsOther investments$276 $276 $1,768 
Real estate LLCs or LPsOther investments4,567 5,286 7,750 
Small business investment LLCs or LPsOther investments8,336 8,254 13,295 
Total$13,179 $13,816 $22,813 
*Maximum potential loss is calculated as the total investment in the LLC or LP including any capital commitments that may have not yet been called. The Company is not exposed to any loss beyond the total commitment of its investment.
Schedule of Fair Value Assets Measured on Recurring Basis
The following table presents, by level, fixed maturity securities carried at estimated fair value as of December 31, 2021 and 2020:
As of December 31, 2021 (in thousands)Level 1Level 2 *Level 3Total
Fixed maturity securities:    
Obligations of U.S. states, territories and political subdivisions$— $61,795 $— $61,795 
Corporate debt securities— 17,996 — 17,996 
Total$— $79,791 $— $79,791 
As of December 31, 2020 (in thousands)Level 1Level 2 *Level 3Total
Fixed maturity securities:
Obligations of U.S. states, territories and political subdivisions$24,083 $66,859 $— $90,942 
Corporate debt securities— 26,771 — 26,771 
Total$24,083 $93,630 $— $117,713 

*Denotes fair market value obtained from pricing services.
Schedule of Carrying Value and Fair Value of Financial Assets
The following table presents, by level, estimated fair values of equity investments and other financial instruments as of December 31, 2021 and 2020:
As of December 31, 2021 (in thousands)Level 1Level 2Level 3Total
Financial assets:
Cash$37,168 $— $— $37,168 
Accrued interest and dividends817 — — 817 
Equity securities, at fair value:
Common stocks76,853 — — 76,853 
Short-term investments:
Money market funds45,930 — — 45,930 
Other investments:
Equity investments in unconsolidated affiliates, measurement alternative— — 8,688 8,688 
Total$160,768 $— $8,688 $169,456 
As of December 31, 2020 (in thousands)Level 1Level 2Level 3Total
Financial assets:
Cash$13,723 $— $— $13,723 
Accrued interest and dividends1,038 — — 1,038 
Equity securities, at fair value:
Common stocks64,919 — — 64,919 
Short-term investments:
Money market funds, Treasury bills, commercial paper and certificates of deposit15,170 — — 15,170 
Other investments:
Equity investments in unconsolidated affiliates, measurement alternative— — 8,741 8,741 
Total$94,850 $— $8,741 $103,591 
Schedule of Cost-method Investments The following table presents a rollforward of equity investments under the measurement alternative and real estate investments as of December 31, 2021 and 2020:

(in thousands)		Balance,
January 1, 2021		Amounts ImpairedObservable ChangesPurchases and
Additional Commitments
Paid		 Sales, Returns
of Capital
and Other
Reductions		Balance,
December 31, 2021
Other investments:
Real estate$— $— $— $5,000 $(13)$4,987 
Equity investments in unconsolidated affiliates, measurement alternative8,741 — — 1,543 (1,596)8,688 
Total$8,741 $— $— $6,543 $(1,609)$13,675 

(in thousands)		Balance,
January 1, 2020		Amounts ImpairedObservable ChangesPurchases and
Additional Commitments
Paid		 Sales, Returns
of Capital
and Other
Reductions		Balance,
December 31, 2020
Other investments:
Real estate$— $— $— $— $— $— 
Equity investments in unconsolidated affiliates, measurement alternative7,899 — — 1,227 (385)8,741 
Total$7,899 $— $— $1,227 $(385)$8,741