Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Investment securities, held to maturity fair value	$ 179,990	$ 215,147
Allowance for loan losses	$ 57,027	$ 17,667
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, shares authorized	99,000,000	99,000,000
Common stock, shares issued	43,905,631	45,000,840
Common stock, shares outstanding	43,880,562	44,975,771