• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Investments - Schedule of Company's Investments in Limited Partnerships (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Investment Securities [Line Items]    
Carrying Value $ 32,293 $ 23,184
Unfunded Balance 16,304 14,328
Private US Lower Middle Market Companies [Member]    
Investment Securities [Line Items]    
Carrying Value 10,169 7,276
Unfunded Balance $ 2,577 $ 5,505
Percentage investment held by the entity 15.37% 15.37%
Bank Loans Public and Private Corporate Bonds Asset Backed Securities Equity and Debt Restructuring [Member]    
Investment Securities [Line Items]    
Carrying Value $ 9,219 $ 7,951
Unfunded Balance   $ 1,745
Percentage investment held by the entity 1.76% 1.76%
Power Utility and Energy Industries and Infrastructure [Member]    
Investment Securities [Line Items]    
Carrying Value $ 9,023 $ 7,509
Unfunded Balance $ 2,329 $ 2,512
Percentage investment held by the entity 0.18% 0.18%
Senior and Junior Debts of Private Equity-Backed Companies [Member]    
Investment Securities [Line Items]    
Carrying Value $ 1,156 $ 448
Unfunded Balance $ 3,706 $ 4,566
Percentage investment held by the entity 0.47% 0.47%
Mature Real Estate Private Equity Funds And Portfolio Globally [Member]    
Investment Securities [Line Items]    
Carrying Value $ 2,726  
Unfunded Balance $ 7,692  
Percentage investment held by the entity 3.28%