Derivative Financial Instruments (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) numberOfRefinancings	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) numberOfRefinancings	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Number of mortgage refinancings | numberOfRefinancings	1		1
Estimated amount to be reclassified from Accumulated other comprehensive income (loss) as an increase to interest expense	$ 25,000		$ 25,000
Interest Expense
Derivative [Line Items]
Amount of (loss) gain recognized on derivative in Other Comprehensive Income	(630,000)	$ 362,000	(2,607,000)	$ 1,937,000
Amount of (loss) gain reclassified from Accumulated Other Comprehensive Income into Interest expense	(307,000)	69,000	(81,000)	28,000
Total amount of Interest expense presented in the Consolidated Statement of Operations	9,845,000	$ 8,965,000	28,353,000	$ 26,408,000
Other Assets
Derivative [Line Items]
Fair value of derivative financial instrument asset	0		0		$ 2,434,000
Accounts payable and accrued liabilities
Derivative [Line Items]
Fair value of derivative financial instrument liability	112,000		112,000		$ 0
Hedging instrument | Interest Rate Swap, Maturity Date April 1, 2022
Derivative [Line Items]
Current Notional Amount	$ 1,201,000		$ 1,201,000
Fixed Rate	5.25%		5.25%
Hedging instrument | Interest Rate Swap, Maturity Date May 6, 2023
Derivative [Line Items]
Current Notional Amount	$ 25,662,000		$ 25,662,000
Fixed Rate	3.61%		3.61%
Hedging instrument | Cash Flow Hedging
Derivative [Line Items]
Loss on acceleration of reclassified hedged transactions	$ 391,000
Not Designated as Hedging Instrument | Interest rate caps
Derivative [Line Items]
Current Notional Amount	9,200,000		$ 9,200,000
Value of derivative	$ 0		$ 0