Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Investment securities, held to maturity fair value	$ 1,827,845	$ 1,559,991
Loans, net of allowance for credit losses	$ 52,508	$ 54,286
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, shares authorized (in shares)	99,000,000	99,000,000
Common stock, shares issued (in shares)	43,874,763	43,766,931
Common stock, shares outstanding (in shares)	43,572,796	43,547,942