Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Investment securities, held to maturity fair value	$ 1,559,991	$ 179,990
Allowance for loan losses	$ 54,286	$ 57,027
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	43,811,421	43,905,631
Common stock, shares outstanding	43,547,942	43,880,562