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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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