SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Nov. 30, 2019 USD ($) home	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	May 31, 2020 USD ($)	Apr. 30, 2020	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($)
Accounting policies
Recognition of operating lease right-of-use assets		$ 202,586		$ 202,586					$ 204,225
Recognition of operating lease liabilities		197,092		197,092					198,558
Allocation of other comprehensive income/(loss)		100	$ (400)	(70)
Significant Accounting Policies
Development costs excluding direct costs and capitalized interest		1,800	1,800	8,700	$ 5,000
Interest capitalized during period		1,700	1,200	3,000	2,300
Notes receivable		156,740		156,740					153,650
Allowance for credit losses		(784)		(784)
Notes receivable, net		155,956		155,956					153,650
Interest Income, Related Party				0	0
Note receivable interest income		2,400	$ 1,200	5,000	2,300
Current Income Tax Expense (Benefit)				0
Deferred tax liabilities, net		(2,800)		(2,800)
Unrecognized tax benefit, accrued interest or penalties due to examination		0		0
Adjustment to rental income		8,500
Adjustment to income (loss)		500
Bellevue, WA 259 Home Community
Significant Accounting Policies
Number of apartment homes | home	259
Note due April 2020
Significant Accounting Policies
Notes receivable		$ 20,000		$ 20,000
Note receivable interest rate							8.00%
Note due October 2020
Significant Accounting Policies
Notes receivable									2,250
Note receivable interest rate		8.00%		8.00%
Note due February 2021
Significant Accounting Policies
Notes receivable		$ 4,000		$ 4,000
Aggregate commitment on note receivable						$ 4,000
Note due May 2022
Significant Accounting Policies
Notes receivable		$ 20,000		$ 20,000					20,000
Note receivable interest rate		8.00%		8.00%
Note due October 2022
Significant Accounting Policies
Notes receivable		$ 115,000		$ 115,000					115,000
Note receivable interest rate		4.75%		4.75%
Note due October 2022 | Bellevue, WA 259 Home Community
Significant Accounting Policies
Aggregate commitment on note receivable	$ 115,000
Deposit made under purchase option agreement	10,000
Payment to acquire real estate	$ 170,000
Purchase option exercisable term	30 days
Maturity date extension term	10 years
Loan interest term	3 years
Amortization schedule term	30 years
Note due January 2023
Significant Accounting Policies
Notes receivable		$ 17,740		$ 17,740					16,400
Notes receivable, net		$ 17,700		$ 17,700
Note receivable interest rate		10.00%		10.00%
Aggregate commitment on note receivable		$ 20,000		$ 20,000
Additional amount loaned				1,300
Note maturity public capital threshold				5,000
Multifamily tenant lease
Significant Accounting Policies
Allowance for doubtful accounts		5,500		5,500
Retail tenant lease
Significant Accounting Policies
Allowance for doubtful accounts		3,500		3,500
Straight-line lease
Significant Accounting Policies
Allowance for doubtful accounts		2,900		2,900
Maximum
Accounting policies
Credit loss		$ 100		100
Significant Accounting Policies
Deferred tax liabilities, net									$ (1,600)
ASU 2016-13
Accounting policies
Retained earnings								$ 2,200
Noncontrolling Interests
Accounting policies
Allocation of other comprehensive income/(loss)				$ (100)	$ (600)