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Goodwill and Intangible Assets - Summary of Analysis of Goodwill by Reporting Segment (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Goodwill [Line Items]  
Goodwill at Beginning of the Year $ 4,460
Goodwill Acquired 12,703
Foreign Currency Translation Adjustment (345)
Goodwill at End of the Year 16,818
U.S.Insurance  
Goodwill [Line Items]  
Goodwill at Beginning of the Year 1,978
Goodwill at End of the Year 1,978
International Insurance  
Goodwill [Line Items]  
Goodwill at Beginning of the Year 2,482
Goodwill Acquired 12,703
Foreign Currency Translation Adjustment (345)
Goodwill at End of the Year $ 14,840