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Goodwill and Intangible Assets - Schedule of Participating Mortgage Loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Total $ 509,101 $ 521,489
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]    
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]    
Total $ 40,462 $ 10,603