• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Fair Value Measurements - Available-for-Sale Securities Measured at Fair Value (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Financial Assets:    
Restricted cash $ 700 $ 809
Short-term Investments 66,479
Total fixed-maturity securities 182,723 237,484
Equity securities 41,143 59,956
Fair Value, Measurements, Recurring [Member]    
Financial Assets:    
Cash and cash equivalents 239,458 255,884
Restricted cash 700 809
Short-term Investments 66,479  
Total available-for-sale securities 182,723 237,484
Equity securities 41,143 59,956
Total financial assets 530,503 554,133
Fair Value, Measurements, Recurring [Member] | U.S. Treasury and U.S. Government Agencies [Member]    
Financial Assets:    
Total fixed-maturity securities 61,797 42,027
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]    
Financial Assets:    
Total fixed-maturity securities 101,905 107,103
Fair Value, Measurements, Recurring [Member] | State, Municipalities, and Political Subdivisions [Member]    
Financial Assets:    
Total fixed-maturity securities 10,662 80,695
Fair Value, Measurements, Recurring [Member] | Exchange-Traded Debt [Member]    
Financial Assets:    
Total fixed-maturity securities 8,247 7,659
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stock [Member]    
Financial Assets:    
Total fixed-maturity securities 112  
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member]    
Financial Assets:    
Cash and cash equivalents 239,458 255,884
Restricted cash 700 809
Short-term Investments 66,479  
Total available-for-sale securities 170,561 154,295
Equity securities 41,143 59,956
Total financial assets 518,341 470,944
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | U.S. Treasury and U.S. Government Agencies [Member]    
Financial Assets:    
Total fixed-maturity securities 60,297 40,527
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Corporate Bonds [Member]    
Financial Assets:    
Total fixed-maturity securities 101,905 106,109
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Exchange-Traded Debt [Member]    
Financial Assets:    
Total fixed-maturity securities 8,247 7,659
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Redeemable Preferred Stock [Member]    
Financial Assets:    
Total fixed-maturity securities 112  
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member]    
Financial Assets:    
Total available-for-sale securities 12,162 83,189
Total financial assets 12,162 83,189
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | U.S. Treasury and U.S. Government Agencies [Member]    
Financial Assets:    
Total fixed-maturity securities 1,500 1,500
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | Corporate Bonds [Member]    
Financial Assets:    
Total fixed-maturity securities 0 994
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | State, Municipalities, and Political Subdivisions [Member]    
Financial Assets:    
Total fixed-maturity securities $ 10,662 $ 80,695