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Share-Based Compensation - Deferred Compensation Plan (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
SERP expense | $ 2,396 | $ 2,271
SERP |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |
SERP expense | 157 | 186
Unrealized (loss) gain recorded in SERP liability account | $ (3,785) | $ 1,301

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- Details
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