• Filing Date: 2017-02-22
  • Form Type: 10-K
  • Description: Annual report
v3.6.0.2
Fair Value Measurements - Available-for-Sale Securities Measured at Fair Value (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Financial Assets:    
Total fixed-maturity securities $ 166,248 $ 125,009
Equity securities 53,035 48,237
Total available-for-sale securities 219,283 173,246
Fair Value, Measurements, Recurring [Member]    
Financial Assets:    
Cash and cash equivalents 280,531 267,738
Total fixed-maturity securities 166,248 125,009
Equity securities 53,035 48,237
Total available-for-sale securities 219,283 173,246
Total financial assets 499,814 440,984
Fair Value, Measurements, Recurring [Member] | U.S. Treasury and U.S. Government Agencies [Member]    
Financial Assets:    
Total fixed-maturity securities 1,939 113
Fair Value, Measurements, Recurring [Member] | Corporate Bonds [Member]    
Financial Assets:    
Total fixed-maturity securities 74,504 37,819
Fair Value, Measurements, Recurring [Member] | State, Municipalities, and Political Subdivisions [Member]    
Financial Assets:    
Total fixed-maturity securities 78,306 77,324
Fair Value, Measurements, Recurring [Member] | Exchange-Traded Debt [Member]    
Financial Assets:    
Total fixed-maturity securities 11,262 9,429
Fair Value, Measurements, Recurring [Member] | Redeemable Preferred Stock [Member]    
Financial Assets:    
Total fixed-maturity securities 237 324
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member]    
Financial Assets:    
Cash and cash equivalents 280,531 267,738
Total fixed-maturity securities 86,957 46,702
Equity securities 53,035 48,237
Total available-for-sale securities 139,992 94,939
Total financial assets 420,523 362,677
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | U.S. Treasury and U.S. Government Agencies [Member]    
Financial Assets:    
Total fixed-maturity securities 1,939 113
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Corporate Bonds [Member]    
Financial Assets:    
Total fixed-maturity securities 73,519 36,836
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Exchange-Traded Debt [Member]    
Financial Assets:    
Total fixed-maturity securities 11,262 9,429
Fair Value, Measurements, Recurring [Member] | (Level 1) [Member] | Redeemable Preferred Stock [Member]    
Financial Assets:    
Total fixed-maturity securities 237 324
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member]    
Financial Assets:    
Total fixed-maturity securities 79,291 78,307
Total available-for-sale securities 79,291 78,307
Total financial assets 79,291 78,307
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | Corporate Bonds [Member]    
Financial Assets:    
Total fixed-maturity securities 985 983
Fair Value, Measurements, Recurring [Member] | (Level 2) [Member] | State, Municipalities, and Political Subdivisions [Member]    
Financial Assets:    
Total fixed-maturity securities $ 78,306 $ 77,324