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Interest Rate Contracts - Narrative (Details)	Jul. 01, 2020 USD ($)	Mar. 10, 2020 USD ($) contract	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Aug. 31, 2020 swapAgreement	Jul. 09, 2015 USD ($) swapAgreement
Derivative [Line Items]
Income expected to be recognized in earnings in next 12 months			$ 13,800,000
Fair value of interest rate swap in a net asset liability position			37,600,000	$ 54,000,000.0
Interest Rate Swap
Derivative [Line Items]
Number of interest rate swap agreements executed		3			4	1
Derivative notional amount	$ 425,000,000.0		750,000,000	750,000,000		$ 425,000,000.0
Term of interest rate contracts	5 years	5 years
Fair value of interest rate swap in a net asset liability position			37,559,000	53,975,000
Interest Rate Swap, Effective March 10, 2020 - $150,000 Notional Amount, Interest Rate 0.83%
Derivative [Line Items]
Derivative notional amount		$ 150,000,000.0	150,000,000	150,000,000
Fair value of interest rate swap in a net asset liability position			216,000	2,963,000
Interest Rate Swap Effective Date July 1, 2020,$125,000 Notional Amount, Interest Rate 2.82%
Derivative [Line Items]
Derivative notional amount		100,000,000.0	125,000,000	125,000,000
Fair value of interest rate swap in a net asset liability position			10,816,000	13,896,000
Interest Rate Swap, Effective March 10, 2020 - $75,000 Notional Amount, Interest Rate 0.86%
Derivative [Line Items]
Derivative notional amount		$ 75,000,000.0	75,000,000	75,000,000
Fair value of interest rate swap in a net asset liability position			$ 201,000	$ 1,580,000

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