CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Securities held-to-maturity
Allowance for credit losses	$ 45	$ 54
Securities held-to-maturity, fair value (in dollars)	$ 539,433	$ 304,927
Preferred stock
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	60,266,316	59,917,457
Common stock, shares outstanding	60,266,316	59,917,457