Loans Receivable - Troubled Debt Restructuring (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 loan	Dec. 31, 2019 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of outstanding TDR loans		1
Carrying value of loans before allowance for loan losses | $		$ 37.8
Troubled debt restructuring, allowance for loan loss | $		$ 37.8
Number of additional lending commitments outstanding to this TDR		0
Performing Financial Instruments
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans modified	0