Significant Accounting Policies - Additional Information (Details 1) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01	Dec. 31, 2018
Personal Insurance Contracts [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue recognition contract term	1 year
Employee Benefits Insurance Contracts [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue recognition contract term	1 year
Contingency Commission Insurance Contracts [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue recognition contract term	1 year
Maximum [Member] | Insurance Contracts [Member]
Summary Of Significant Accounting Policies [Line Items]
Revenue recognition contract term	1 year