Other Assets - Schedule of Investing Commitment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Other Commitments [Line Items]
Original commitment amount	$ 48,859
Less: life to date contributions	(37,607)
Remaining commitment amount	$ 11,252
Centerline XXII
Other Commitments [Line Items]
Years over which tax benefits are earned	18 years
Original commitment amount	$ 3,000
Less: life to date contributions	(3,000)
Remaining commitment amount	$ 0
Centerline XXXIII
Other Commitments [Line Items]
Years over which tax benefits are earned	18 years
Original commitment amount	$ 3,000
Less: life to date contributions	(3,000)
Remaining commitment amount	$ 0
USA 57
Other Commitments [Line Items]
Years over which tax benefits are earned	15 years
Original commitment amount	$ 3,000
Less: life to date contributions	(3,000)
Remaining commitment amount	$ 0
WNC
Other Commitments [Line Items]
Years over which tax benefits are earned	16 years
Original commitment amount	$ 2,500
Less: life to date contributions	(2,500)
Remaining commitment amount	$ 0
R4 - Coronado
Other Commitments [Line Items]
Years over which tax benefits are earned	17 years
Original commitment amount	$ 10,729
Less: life to date contributions	(10,604)
Remaining commitment amount	$ 125
R4 - MVV
Other Commitments [Line Items]
Years over which tax benefits are earned	17 years
Original commitment amount	$ 8,528
Less: life to date contributions	(8,308)
Remaining commitment amount	$ 220
R4 - PJ33
Other Commitments [Line Items]
Years over which tax benefits are earned	17 years
Original commitment amount	$ 6,835
Less: life to date contributions	(6,495)
Remaining commitment amount	$ 340
R4 - Coronado II
Other Commitments [Line Items]
Years over which tax benefits are earned	17 years
Original commitment amount	$ 7,282
Less: life to date contributions	(341)
Remaining commitment amount	$ 6,941
R4 - Duke Apartments
Other Commitments [Line Items]
Years over which tax benefits are earned	17 years
Original commitment amount	$ 3,985
Less: life to date contributions	(359)
Remaining commitment amount	$ 3,626