Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]

Schedule of Fair Values of Financial Assets and Liabilities Measured at Fair Value

The table below aggregates the fair values of these financial assets and liabilities as of December 31, 2016 and 2015, based on their levels in the fair value hierarchy.

	The Company
	As of December 31, 2016
(Amounts in thousands)	Total		Level 1		Level 2		Level 3
Marketable securities	$	22,393	$	22,393	$	-	$	-
Interest rate swap assets (included in "other assets")		139		-		139		-
Total assets	$	22,532	$	22,393	$	139	$	-
Interest rate swap liabilities	$	22,446	$	-	$	22,446	$	-
Total liabilities	$	22,446	$	-	$	22,446	$	-
	As of December 31, 2015
(Amounts in thousands)	Total		Level 1		Level 2		Level 3
Real estate fund investments:
Investments in Property Funds	$	248,824	$	-	$	-	$	248,824
Investments in Alternative Investment Funds		167,614		-		-		167,614
Total real estate fund investments		416,438		-		-		416,438
Marketable securities		21,521		21,521		-		-
Total assets	$	437,959	$	21,521	$	-	$	416,438
Interest rate swap liabilities	$	93,936	$	-	$	93,936	$	-
Total liabilities	$	93,936	$	-	$	93,936	$	-

Summary of Changes in Fair Value of Real Estate Fund Investments in Level 3

The table below summarizes the changes in the fair value of Real Estate Fund Investments that are classified as Level 3, as of December 31, 2015.  

	The Company
	Real Estate Fund Investments
(Amounts in thousands)	for the Year Ended December 31, 2015
Beginning balance	$	323,387
Purchases / Additions		170,218
Sales / Transfer of assets		(98,368	)
Net realized gains		7,455
Previously recorded unrealized gains on exited investments		(6,584	)
Net unrealized gains		20,330
Ending balance	$	416,438

Summary of Carrying Amounts and Fair Value of Financial Instruments

The following is a summary of the carrying amounts and fair value of these financial instruments as of December 31, 2016 and 2015.

	The Company
	As of December 31, 2016				As of December 31, 2015
(Amounts in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Cash equivalents	$	107,100	$	107,100	$	118,561	$	118,561
Total assets	$	107,100	$	107,100	$	118,561	$	118,561
	As of December 31, 2016				As of December 31, 2015
(Amounts in thousands)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Notes and mortgages payable	$	3,408,179	$	3,371,262	$	2,941,524	$	2,907,242
Revolving credit facility		230,000		230,018		20,000		20,723
Total liabilities	$	3,638,179	$	3,601,280	$	2,961,524	$	2,927,965

Property Funds [Member]

Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]

Summary of Significant Unobservable Quantitative Inputs Utilized in Determining Fair Value of Investments

Significant unobservable quantitative inputs in the table below were utilized in determining the fair value of the Property Fund investments as of December 31, 2015.

	As of December 31, 2015
Unobservable Quantitative Input	Range	Weighted Average (based on fair value of investments)
Discount rates	7.00% - 7.50%		7.18%
Terminal capitalization rates	5.00% - 6.00%		5.47%

Alternative Investment Fund [Member]

Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]

Summary of Significant Unobservable Quantitative Inputs Utilized in Determining Fair Value of Investments

Significant unobservable quantitative inputs in the table below were utilized in determining the fair value of the investment in the Alternative Investment Fund as of December 31, 2015.

	As of December 31, 2015
Unobservable Quantitative Input	Range		Weighted Average (based on fair value of investments)
Preferred return	7.32% - 14.02%			9.51%
Credit spread		2.34%		2.34%