Fair Value of Financial Instruments - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Details) - Fair Value, Measurements, Nonrecurring - REO - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Other assets	$ 1,117	$ 4,051
Gain (loss) on assets measured at fair value on a non-recurring basis	(157)	(1,363)
Level 1
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Other assets	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Other assets	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Other assets	$ 1,117	$ 4,051