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Accounting for Stock-based Compensation - Outstanding Stock Option Activity (Details) - Employee Stock Option - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Number of Shares, Outstanding Beginning Balance | 10,885 | 29,692 | 38,227 |
Number of Shares, Exercised | (8,254) | (18,807) | (8,535) |
Number of Shares, Granted |  | 0 | 0 | 0
Number of Shares, Outstanding Ending Balance | 2,631 | 10,885 | 29,692 | 38,227
Number of Shares, Vested plus expected to vest at December 31, 2022 | 2,631 |  |  |
Number of Shares, Exercisable at December 31, 2022 | 2,631 |  |  |
Weighted Average Exercise Price, Outstanding Beginning Balance | $ 35.49 | $ 33.30 | $ 31.93 |
Weighted Average Exercise Price, Exercised | 33.84 | 32.04 | 27.17 |
Weighted Average Exercise Price, Outstanding Ending Balance | 40.68 | $ 35.49 | $ 33.30 | $ 31.93
Weighted Average Exercise Price, Vested plus expected to vest at December 31, 2022 | 40.68 |  |  |
Weighted Average Exercise Price, Exercisable at December 31, 2022 | $ 40.68 |  |  |
Aggregate Intrinsic Value, Outstanding at December 31, 2022 | $ 246 |  |  |
Aggregate Intrinsic Value, Vested plus expected to vest at December 31, 2022 | 246 |  |  |
Aggregate Intrinsic Value, Exercisable at December 31, 2022 | $ 246 |  |  |

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