• Filing Date: 2020-03-06
  • Form Type: 10-K
  • Description: Annual report
v3.19.3.a.u2
Investments - Summary of Securities with Gross Unrealized Loss Positions Aggregated by Investment Category (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]    
Gross Unrealized Loss, Less than Twelve Months $ (21) $ (871)
Estimated Fair Value, Less than Twelve Months 7,234 47,065
Gross Unrealized Loss, Twelve Months or Longer   (1,414)
Estimated Fair Value, Twelve Months or Longer   72,075
Gross Unrealized Loss, Total (21) (2,285)
Estimated Fair Value, Total 7,234 119,140
Fixed-Maturity Securities [Member] | U.S. Treasury and U.S. Government Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Gross Unrealized Loss, Less than Twelve Months (3) (59)
Estimated Fair Value, Less than Twelve Months 2,292 21,031
Gross Unrealized Loss, Twelve Months or Longer   (147)
Estimated Fair Value, Twelve Months or Longer   35,393
Gross Unrealized Loss, Total (3) (206)
Estimated Fair Value, Total 2,292 56,424
Fixed-Maturity Securities [Member] | Corporate Bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Gross Unrealized Loss, Less than Twelve Months (3) (542)
Estimated Fair Value, Less than Twelve Months 4,597 19,932
Gross Unrealized Loss, Twelve Months or Longer   (1,267)
Estimated Fair Value, Twelve Months or Longer   36,682
Gross Unrealized Loss, Total (3) (1,809)
Estimated Fair Value, Total 4,597 56,614
Fixed-Maturity Securities [Member] | Exchange-Traded Debt [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Gross Unrealized Loss, Less than Twelve Months (15) (261)
Estimated Fair Value, Less than Twelve Months 345 5,275
Gross Unrealized Loss, Twelve Months or Longer 0 0
Estimated Fair Value, Twelve Months or Longer 0 0
Gross Unrealized Loss, Total (15) (261)
Estimated Fair Value, Total $ 345 5,275
Fixed-Maturity Securities [Member] | State, Municipalities, and Political Subdivisions [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Gross Unrealized Loss, Less than Twelve Months   (3)
Estimated Fair Value, Less than Twelve Months   715
Gross Unrealized Loss, Twelve Months or Longer   0
Estimated Fair Value, Twelve Months or Longer   0
Gross Unrealized Loss, Total   (3)
Estimated Fair Value, Total   715
Fixed-Maturity Securities [Member] | Redeemable Preferred Stock [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Gross Unrealized Loss, Less than Twelve Months   (6)
Estimated Fair Value, Less than Twelve Months   112
Gross Unrealized Loss, Twelve Months or Longer   0
Estimated Fair Value, Twelve Months or Longer   0
Gross Unrealized Loss, Total   (6)
Estimated Fair Value, Total   $ 112