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Mortgage Notes Payable and Credit Facility Mortgage Notes Payable and Credit Facility - Derivative Instruments Impact (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Change in unrealized (loss) gain related to interest rate hedging instruments, net	$ (1,978)
Change in unrealized (loss) gain related to interest rate hedging instruments, net		$ (183)	$ 35
Interest rate caps
Derivative Instruments, Gain (Loss) [Line Items]
Change in unrealized (loss) gain related to interest rate hedging instruments, net	(749)
Change in unrealized (loss) gain related to interest rate hedging instruments, net		77	(239)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Change in unrealized (loss) gain related to interest rate hedging instruments, net	$ (1,229)
Change in unrealized (loss) gain related to interest rate hedging instruments, net		$ (260)	$ 274

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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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-Publisher FASB
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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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