• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Investments - Investment (Loss) Income Summarized (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]      
Investment income $ 4,430 $ 2,334 $ 1,207
Net investment income (loss) from real estate investments 340 (1,018) (592)
Loss from unconsolidated joint venture 304 (234)
Net investment income 16,581 11,439 9,087
Limited Partnership Investment [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 4,430 2,334 1,207
Cash and Cash Equivalents [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 3,485 2,069 1,036
Short-term Investments [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 1,375
Other Types Of Investments [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 7 46
Investment Expense [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment expense (581) (726) (651)
Available-for-Sale Securities [Member] | Fixed-Maturity Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 5,104 5,689 4,589
Available-for-Sale Securities [Member] | Equity Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income $ 2,124 $ 3,318 $ 3,452