Real Estate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Debt related to real estate owned, held for sale	$ 33,000	$ 0
Specific CECL allowance (reversal)	118,019	$ 13,000
Mezzanine, Amortized cost
Debt Securities, Available-for-sale [Line Items]
Fair value of real estate assets, net of related debt less than cost basis	1,000
Specific CECL allowance (reversal)	1,400
Hotel - Anaheim, CA | Subordinate Mortgage Portfolio Segment
Debt Securities, Available-for-sale [Line Items]
Debt related to real estate owned, held for sale	33,000
Loans	$ 12,300