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Investments Narrative (Details)
$ in Millions
Oct. 04, 2018
Sep. 30, 2018
USD ($)
VIE
Dec. 31, 2017
USD ($)
VIE
Schedule of Equity Method Investments [Line Items]      
Number of Variable Interest Entities with Debt | VIE   0 0
BRI BDL [Member]      
Schedule of Equity Method Investments [Line Items]      
Guarantees, Fair Value Disclosure | $   $ 44.3 $ 38.1
Subsequent Event | Joint Venture [Member]      
Schedule of Equity Method Investments [Line Items]      
Controlling interest in joint venture 57.50%