• Filing Date: 2019-03-08
  • Form Type: 10-K
  • Description: Annual report
v3.10.0.1
Segment Information - Additional Information (Detail) - Segments
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Number of operating divisions 3    
Sales Revenue, Net [Member] | Segment Concentration Risk [Member] | Insurance Operations [Member]      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 95.00% 96.20% 95.50%
Assets [Member] | Segment Concentration Risk [Member] | Insurance Operations [Member]      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 85.90% 87.10% 87.90%