• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2017
USD ($)
JointVenture
Dec. 31, 2016
USD ($)
Dec. 15, 2016
Summary Of Significant Accounting Policies [Line Items]      
Percentage of investment in unconsolidated entities 90.00%   90.00%
ADC Arrangement Prior to August 16, 2016, the Company was party to an Acquisition, Development and Construction loan agreement (“ADC Arrangement”) whereby the Company provided financing to a property developer for the construction of a retail shopping center. Because the Company expected to receive more than 50% of the residual profit from the ADC Arrangement which had characteristics similar to a real estate investment, the costs of the real estate project were capitalized and interest was recognized in net investment income.    
Period for establishing allowance on insurance premiums receivable 90 days    
Allowance on insurance premiums receivable $ 0 $ 0  
Percentage of minimum tax benefit realized upon settlement 50.00%    
Likelihood of tax realization upon settlement 50.00%    
Operating expenses totaling reclassified to general and administrative personnel expenses $ 7,163,000 $ 8,136,000  
Capitalized Software Cost [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful life 7 years    
Building [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of Property and Equipment 39 years    
Computer Hardware and Software [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of Property and Equipment 3 years    
Minimum [Member] | Office Furniture and Equipment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of Property and Equipment 3 years    
Maximum [Member] | Office Furniture and Equipment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Useful lives of Property and Equipment 7 years    
Investment in Joint Venture [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of investment in unconsolidated entities 90.00%    
Variable Interest Entity [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Percentage of investment in unconsolidated entities 100.00%    
Number of joint venture | JointVenture 1