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Investments (Tables)
3 Months Ended
Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of Cost or Amortized Cost and Fair Value of Securities Available for Sale
The following table provides the amortized cost and fair value of available-for-sale debt securities as of the dates presented (in thousands):

March 31, 2021
Amortized
Cost
Allowance for Expected Credit LossesGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
Debt Securities:
  U.S. government obligations and agencies$40,284 $— $123 $(340)$40,067 
  Corporate bonds536,479 (175)1,102 (13,077)524,329 
  Mortgage-backed and asset-backed securities330,939 (2)559 (5,799)325,697 
  Municipal bonds16,400 (1)— (574)15,825 
  Redeemable preferred stock7,072 (42)250 (67)7,213 
Total$931,174 $(220)$2,034 $(19,857)$913,131 

December 31, 2020
Amortized
Cost
Allowance for Expected Credit LossesGross
Unrealized
Gains
Gross
Unrealized
Losses
Fair Value
Debt Securities:
  U.S. government obligations and agencies$59,529 $— $157 $(55)$59,631 
  Corporate bonds416,758 (148)3,571 (337)419,844 
  Mortgage-backed and asset-backed securities319,377 — 1,175 (615)319,937 
  Municipal bonds11,990 — 138 — 12,128 
  Redeemable preferred stock7,993 (38)424 (58)8,321 
Total$815,647 $(186)$5,465 $(1,065)$819,861 
Schedule of Credit Quality of Investment Securities With Contractual Maturities or The Issuer of Such Securities
The following table provides the credit quality of available-for-sale debt securities with contractual maturities as of the dates presented (dollars in thousands):

March 31, 2021December 31, 2020
Equivalent S&P Credit RatingsFair Value% of Total
 Fair Value
Fair Value% of Total
 Fair Value
AAA$326,429 35.7 %$337,462 41.2 %
AA109,334 12.0 %89,681 10.9 %
A287,372 31.5 %230,290 28.1 %
BBB188,371 20.6 %160,662 19.6 %
BB and Below227 — %233 — %
No Rating Available1,398 0.2 %1,533 0.2 %
   Total$913,131 100.0 %$819,861 100.0 %
Schedule of Amortized Cost and Fair Value on Mortgage-Backed and Asset-Backed Securities
The following table summarizes the amortized cost and fair value of mortgage-backed and asset-backed securities as of the dates presented (in thousands):

March 31, 2021December 31, 2020
Amortized
Cost
Fair ValueAmortized
Cost
Fair Value
Mortgage-backed Securities:
Agency$159,583 $156,281 $153,937 $153,758 
Non-agency57,231 55,262 54,231 54,666 
Asset-backed Securities:
Auto loan receivables68,860 68,908 68,188 68,440 
Credit card receivables7,850 7,855 7,878 7,891 
Other receivables37,415 37,391 35,143 35,182 
Total$330,939 $325,697 $319,377 $319,937 
Schedule of Fair Value and Gross Unrealized Losses on Securities Available for Sale
The following tables summarize available-for-sale debt securities, aggregated by major security type and length of time that individual securities have been in a continuous unrealized loss position, for which no allowance for expected credit losses has been recorded as of the dates presented (in thousands):

March 31, 2021
Less Than 12 Months12 Months or Longer
Number of
Issues
Fair ValueUnrealized
Losses
Number of
Issues
Fair ValueUnrealized
Losses
Debt Securities:
U.S. government obligations and agencies$37,127 $(340)— $— $— 
Corporate bonds211 311,967 (8,712)1,141 (32)
Mortgage-backed and asset-backed securities107 249,319 (5,799)— — — 
Municipal bonds13,402 (503)— — — 
Redeemable preferred stock— — — — — — 
Total333 $611,815 $(15,354)$1,141 $(32)

December 31, 2020
Less Than 12 Months12 Months or Longer
Number of
Issues
Fair ValueUnrealized
Losses
Number of
Issues
Fair ValueUnrealized
Losses
Debt Securities:
U.S. government obligations and agencies$31,729 $(55)— $— $— 
Corporate bonds27 28,791 (162)— — — 
Mortgage-backed and asset-backed securities42 112,462 (615)— — — 
Municipal bonds— — — — — — 
Redeemable preferred stock688 (12)— — — 
Total79 $173,670 $(844)— $— $— 
Schedule of Debt Securities, Available-for-sale, Allowance for Credit Loss
The following table presents a reconciliation of the beginning and ending balances for expected credit losses on available-for-sale debt securities (in thousands):
Corporate BondsMortgage-Backed and Asset-Backed SecuritiesMunicipal BondsRedeemable
 Preferred Stock
Total
Balance, December 31, 2019$— $— $— $— $— 
Cumulative effect adjustment as of
 January 1, 2020
665 — — 126 791 
Increase (decrease)(517)— — (88)(605)
Balance, December 31, 2020148 — — 38 186 
Increase (decrease)27 34 
Balance, March 31, 2021$175 $$$42 $220 
Schedule of Amortized Cost and Fair Value of Investments With Contractual Maturities
The following table presents the amortized cost and fair value of investments with maturities as of the date presented (in thousands):
March 31, 2021
Amortized CostFair Value
Due in one year or less$19,275 $19,357 
Due after one year through five years516,595 513,373 
Due after five years through ten years374,044 359,574 
Due after ten years21,095 20,630 
Perpetual maturity securities165 197 
Total$931,174 $913,131 
Schedule of Securities Available for Sale
The following table provides certain information related to available-for-sale debt securities, equity securities and investment in real estate during the periods presented (in thousands):
Three Months Ended
March 31,
20212020
Proceeds from sales and maturities (fair value):
  Available-for-sale debt securities$52,633 $42,513 
  Equity securities$1,576 $— 
Gross realized gains on sale of securities:
  Available-for-sale debt securities$122 $346 
  Equity securities$343 $— 
Gross realized losses on sale of securities:
  Available-for-sale debt securities$(324)$(47)
  Equity securities$— $— 
Realized gains on sales of investment real estate$401 $— 
Schedule of Investment Income (Expense) Comprised Primarily of Interest and Dividends
The following table presents the components of net investment income, comprised primarily of interest and dividends, for the periods presented (in thousands):
Three Months Ended
March 31,
20212020
Available-for-sale debt securities$2,829 $6,015 
Equity securities591 545 
Cash and cash equivalents (1)11 791 
Other (2)268 254 
  Total investment income3,699 7,605 
Less: Investment expenses (3)(713)(771)
  Net investment income$2,986 $6,834 

(1)
Includes interest earned on restricted cash and cash equivalents.
(2)
Includes investment income earned on real estate investments.
(3)
Includes custodial fees, investment accounting and advisory fees, and expenses associated with real estate investments.
Schedule of Details on Realized and Unrealized Gains and Losses Related to Equity Securities
The following table provides the unrealized gains and losses recognized for the periods presented on equity securities still held at the end of the reported period (in thousands):
Three Months Ended
March 31,
20212020
Unrealized gains (losses) recognized during the reported period on equity securities still held at the end of the reported period$(519)$(8,024)
Schedule of Real Estate Investment
Investment real estate consisted of the following as of the dates presented (in thousands):
March 31,December 31,
20212020
Income Producing:
Investment real estate$7,087 $14,685 
Less: Accumulated depreciation(1,060)(1,699)
6,027 12,986 
Non-Income Producing:  
Investment real estate — 2,190 
Investment real estate, net$6,027 $15,176 
Schedule of Depreciation Expense Related to Investment Real Estate
Depreciation expense related to investment real estate for the periods presented (in thousands):

Three Months Ended
March 31,
 20212020
Depreciation expense on investment real estate$46 $104