Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Nominal or face amount used to calculate payment on derivative.

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The number of derivative instruments of a particular group held by the entity.

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- Definition

Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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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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Derivative Instruments and Hedging Activities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) derivative	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Number of interest rate swap agreements \| derivative	4
Interest rate cap/swap agreements	$ 843	$ (4,585)
Interest rate cap/swap agreements			$ (4,424)
Derivatives, Fair Value [Line Items]
Fair Value	$ (8,208)	(9,051)
Interest rate swap
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Number of interest rate swap agreements \| derivative	4
Level 2 \| Interest rate cap
Derivatives, Fair Value [Line Items]
Notional Amount	$ 300,000
LIBOR Rate	4.00%
Fair Value	$ 0	0
Level 2 \| Interest rate swap
Derivatives, Fair Value [Line Items]
Notional Amount	$ 400,000
LIBOR Rate	2.85%
Fair Value	$ (8,208)	$ (9,051)