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Loans Held for Sale - Schedule of Loans Held for Sale Fair Value (Footnote) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in fair value of loans held for sale	$ (10,100,000)	$ (7,500,000)
Loans held for sale, at fair value	253,037,000	135,691,000	$ 208,752,000	$ 176,525,000
Ginnie Mae Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale, at fair value	$ 26,000,000.0	$ 0

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Amount of increase (decrease) in fair value from changes in the assumptions or model used to calculate the fair value of a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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