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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator [Abstract] |  |  |  |  |  |  |  |  |  |  |
Distributed earnings |  |  |  |  |  |  |  |  | $ 48,837 | $ 46,564 | $ 13,913
Undistributed earnings |  |  |  |  |  |  |  |  | 35,653 | 7,954 | 6,284
Basic |  |  |  |  |  |  |  |  | 84,490 | 54,518 | 20,197
Diluted |  |  |  |  |  |  |  |  | $ 90,803 | $ 59,148 | $ 21,865
Denominator [Abstract] |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding - basic (in shares) |  |  |  |  |  |  |  |  | 16,710 | 17,128 | 18,360
Assumed conversion of Class A Common Stock (in shares) |  |  |  |  |  |  |  |  | 1,330 | 1,522 | 1,611
Dilutive awards and common stock equivalents (in shares) |  |  |  |  |  |  |  |  | 503 | 282 | 290
Total weighted average diluted Common Stock (in shares) |  |  |  |  |  |  |  |  | 18,543 | 18,932 | 20,261
Net Earnings per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Basic net earnings per share (in dollars per share) | $ 1.39 | $ 1.35 | $ 1.25 | $ 1.07 | $ 1.40 | $ 0.98 | $ 0.73 | $ 0.10 | $ 5.06 | $ 3.18 | $ 1.10
Diluted net earnings per share (in dollars per share) | 1.35 | 1.31 | 1.21 | 1.04 | 1.37 | 0.97 | 0.72 | 0.09 | $ 4.90 | $ 3.12 | $ 1.08
Class A Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |
Numerator [Abstract] |  |  |  |  |  |  |  |  |  |  |
Distributed earnings |  |  |  |  |  |  |  |  | $ 3,609 | $ 3,957 | $ 1,143
Undistributed earnings |  |  |  |  |  |  |  |  | 2,704 | 673 | 525
Basic |  |  |  |  |  |  |  |  | $ 6,313 | $ 4,630 | $ 1,668
Denominator [Abstract] |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding (in shares) |  |  |  |  |  |  |  |  | 1,330 | 1,522 | 1,611
Net Earnings per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Basic net earnings per share (in dollars per share) | 1.31 | 1.28 | 1.18 | 1.00 | 1.33 | 0.94 | 0.69 | 0.09 | $ 4.75 | $ 3.04 | $ 1.04
Diluted net earnings per share (in dollars per share) | $ 1.33 | $ 1.25 | $ 1.16 | $ 0.98 | $ 1.35 | $ 0.93 | $ 0.69 | $ 0.09 | $ 4.69 | $ 3.04 | $ 1.03

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