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BUSINESS COMBINATIONS - Intangible assets (Details) - Novae
$ in Thousands
Oct. 02, 2017
USD ($)
Business Acquisition [Line Items]  
Indefinite lived intangible assets $ 94,748
Finite lived other intangible assets 385,000
Identifiable intangible assets at October 2, 2017 223,211
Coverholders  
Business Acquisition [Line Items]  
Finite lived other intangible assets $ 63,565
Economic useful life 12 years
Large brokers  
Business Acquisition [Line Items]  
Finite lived other intangible assets $ 46,641
Economic useful life 15 years
Small & Mid-sized Enterprise (SME) brokers  
Business Acquisition [Line Items]  
Finite lived other intangible assets $ 14,126
Economic useful life 12 years
Managing General Agent (MGA) Contract  
Business Acquisition [Line Items]  
Finite lived other intangible assets $ 4,131
Economic useful life 7 years
Distribution networks  
Business Acquisition [Line Items]  
Finite lived other intangible assets $ 128,463