• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Investments - Summary of Amortized Cost, Gross Unrealized Gains and Losses, and Estimated Fair Value of Available-for-Sale Securities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]    
Fixed-maturity securities, Cost or Amortized Cost $ 184,670 $ 235,633
Total available-for-sale securities, Gross Unrealized Gain 338 3,124
Total available-for-sale securities, Gross Unrealized Loss (2,285) (1,273)
Fixed-maturity securities, Estimated Fair Value 182,723 237,484
Fixed-Maturity Securities [Member] | U.S. Treasury and U.S. Government Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fixed-maturity securities, Cost or Amortized Cost 61,979 42,313
Total available-for-sale securities, Gross Unrealized Gain 24 1
Total available-for-sale securities, Gross Unrealized Loss (206) (287)
Fixed-maturity securities, Estimated Fair Value 61,797 42,027
Fixed-Maturity Securities [Member] | Corporate Bonds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fixed-maturity securities, Cost or Amortized Cost 103,580 106,897
Total available-for-sale securities, Gross Unrealized Gain 134 1,110
Total available-for-sale securities, Gross Unrealized Loss (1,809) (904)
Fixed-maturity securities, Estimated Fair Value 101,905 107,103
Fixed-Maturity Securities [Member] | State, Municipalities, and Political Subdivisions [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fixed-maturity securities, Cost or Amortized Cost 10,567 78,954
Total available-for-sale securities, Gross Unrealized Gain 98 1,816
Total available-for-sale securities, Gross Unrealized Loss (3) (75)
Fixed-maturity securities, Estimated Fair Value 10,662 80,695
Fixed-Maturity Securities [Member] | Exchange-Traded Debt [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fixed-maturity securities, Cost or Amortized Cost 8,426 7,469
Total available-for-sale securities, Gross Unrealized Gain 82 197
Total available-for-sale securities, Gross Unrealized Loss (261) (7)
Fixed-maturity securities, Estimated Fair Value 8,247 $ 7,659
Fixed-Maturity Securities [Member] | Redeemable Preferred Stock [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fixed-maturity securities, Cost or Amortized Cost 118  
Total available-for-sale securities, Gross Unrealized Loss (6)  
Fixed-maturity securities, Estimated Fair Value $ 112