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Summary of Significant Accounting Policies - Narrative (Details)
$ in Millions
Jul. 02, 2019
USD ($)
Jun. 30, 2019
market
Schedule of Equity Method Investments [Line Items]    
Number of markets entity operates | market   11
Subsequent Event | Advocate Capital, Inc.    
Schedule of Equity Method Investments [Line Items]    
Acquisition, cash price | $ $ 59  
Bankers Healthcare Group, LLC    
Schedule of Equity Method Investments [Line Items]    
Ownership interest (as percent)   49.00%