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Share Repurchase Program - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 05, 2018 | Jan. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |
Common stock, par value | $ 0.10 |  | $ 0.10 | $ 0.10 |  | $ 0.10
Amount paid for common shares purchase |  | $ 2,604,000 |  |  | $ 2,604,000 |
Common Stock |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |
Shares repurchase program, expiration date | Mar. 08, 2019 |  |  |  |  |
Number of shares purchased |  | 158,048 | 0 | 0 |  |
Average price paid per share |  | $ 16.48 |  |  |  |
Common Stock | Maximum |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |
Number of shares intended to repurchase under repurchase program | $ 20,000 |  |  |  |  |

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