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Derivative Instruments (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effect of Derivative Instruments on Consolidated Statements of Income and Consolidated Statements of Comprehensive Income
Realized loss on derivative instruments, net	$ (2,237)	$ (2,072)	$ 900
Unrealized (gain) loss on derivative instruments	3,107	430	(1,397)
Comprehensive loss | Interest rate swap agreements | Designated as Hedging Instrument [Member]
Effect of Derivative Instruments on Consolidated Statements of Income and Consolidated Statements of Comprehensive Income
Designated derivative instruments	48,653	2,119	641
Interest expense | Interest rate swap agreements | Designated as Hedging Instrument [Member]
Effect of Derivative Instruments on Consolidated Statements of Income and Consolidated Statements of Comprehensive Income
Designated derivative instruments	(6,048)	(6,780)	611
Gain (Loss) on Derivative Instruments [Member] | Interest rate swap agreements | Not Designated as Hedging Instrument [Member]
Effect of Derivative Instruments on Consolidated Statements of Income and Consolidated Statements of Comprehensive Income
Realized loss on derivative instruments, net	(2,237)	(2,072)	900
Unrealized (Gain) Loss On Derivative Instruments [Member] | Interest rate swap agreements | Not Designated as Hedging Instrument [Member]
Effect of Derivative Instruments on Consolidated Statements of Income and Consolidated Statements of Comprehensive Income
Unrealized (gain) loss on derivative instruments	$ 3,107	$ 430	$ (1,397)

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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Amount before 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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