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Stockholders' Equity - Summary of Preferred and Common Stock (Details) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Shares authorized	50,000	50,000
Shares issued	10,438	10,438
Shares outstanding	10,438	10,438
Common stock, voting par value	$ 0.01	$ 0.01
Common stock, voting shares authorized	150,000,000	150,000,000
Common stock, voting shares issued	39,170,541	38,736,540
Shares outstanding	37,690,087	38,618,054
Treasury common shares	1,480,454	118,486
Series B 7.5% Fixed to Floating Non-Cumulative Perpetual Preferred Stock
Class Of Stock [Line Items]
Par value	$ 0.01	$ 0.01
Shares authorized	50,000	50,000
Shares issued	10,438	10,438
Shares outstanding	10,438	10,438

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