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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |
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Aug. 16, 2021 | Jul. 22, 2021 | May 17, 2021 | Apr. 22, 2021 | Mar. 15, 2021 | Feb. 22, 2021 | Jan. 28, 2021 | Sep. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Jun. 17, 2021 | Jun. 16, 2021 | Apr. 26, 2021 | Dec. 31, 2020
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared per common share |  | $ 0.125 |  | $ 0.125 |  |  | $ 0.125 |  |  |  |  |  |  |
Cash dividend paid per common share | $ 0.125 |  | $ 0.125 |  |  | $ 0.125 |  |  |  |  |  |  |  |
Special dividend paid per common share |  |  |  |  | $ 1.00 |  |  |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000 |
Common Stock, Par or Stated Value Per Share |  |  |  |  |  |  |  | $ 1 | $ 1 |  |  |  | $ 1.00 | $ 1
Common stock, Authorized shares |  |  |  |  |  |  |  | 25,000,000 | 25,000,000 |  | 25,000,000 | 10,000,000 |  | 10,000,000
Treasury stock purchased |  |  |  |  |  |  |  | 78,491 |  |  |  |  |  |
Shares repurchased average price |  |  |  |  |  |  |  | $ 27.41 |  |  |  |  |  |
Payments for Repurchase of Common Stock |  |  |  |  |  |  |  | $ 2,200 | $ 2,197 | $ 5,703 |  |  |  |

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