• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Investments - Investment (Loss) Income Summarized (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]      
Investment income $ 2,334 $ 1,207 $ (3,244)
Net investment income (loss) from real estate investments (1,018) (592) (343)
Loss from unconsolidated joint venture (234)   (125)
Net investment income 11,439 9,087 3,978
Limited Partnership Investment [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 2,334 1,207 (3,244)
Cash and Cash Equivalents [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 2,069 1,036 661
Other Types Of Investments [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 7 46 57
Investment Expense [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment expense (726) (651) (673)
Available-for-Sale Securities [Member] | Fixed-Maturity Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income 5,689 4,589 3,935
Available-for-Sale Securities [Member] | Equity Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Investment income $ 3,318 $ 3,452 $ 3,710