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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Securities held to maturity, fair value $ 369,953 $ 170,734
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, shares authorized (in shares) 40,000,000 40,000,000
Common stock, shares issued (in shares) 28,524,480 28,579,335
Common stock, shares outstanding (in shares) 28,524,480 28,579,335