XML 52 R36.htm IDEA: XBRL DOCUMENT v3.19.3
Principles of Consolidation and Basis of Presentation - Additional Information (Detail)
3 Months Ended 9 Months Ended
Mar. 31, 2019
Segment
Sep. 30, 2019
Segment
Product
Organization And Basis Of Presentation [Line Items]    
Date of incorporation   Feb. 09, 2016
State of incorporation   E9
Kind of listing   A ordinary shares
Number of business segments   4
Commercial Specialty    
Organization And Basis Of Presentation [Line Items]    
Number of product classifications | Product   4
Specialty Property and Farm, Ranch, & Stable    
Organization And Basis Of Presentation [Line Items]    
Number of business segments 2