XML 97 R83.htm IDEA: XBRL DOCUMENT v3.8.0.1
Insurance Products and Reinsurance of Certain Risks - Additional Information (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Insurance [Line Items]    
Restricted cash $ 16,787 $ 8,297
Letter of credit 500 2,000
Letter of Credit [Member]    
Insurance [Line Items]    
Restricted cash $ 6,100 $ 3,900