Parent Company Financial Statements - Schedule of Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 784,864	$ 447,201
Other assets	12,775	8,231
Total Assets	3,224,710	2,642,634
LIABILITIES
Accrued expenses and other liabilities	11,060	10,789
Total Liabilities	2,926,560	2,357,156
STOCKHOLDERS’ EQUITY
Preferred stock, no par value: Authorized - 1,000,000 shares; None Issued and Outstanding	0	0
Common stock, no par value: Authorized - 30,000,000 shares; Issued and Outstanding - 7,180,155 and 7,325,333 shares, respectively	60,233	68,055
Additional paid-in capital	1,814	1,545
Retained earnings	239,876	208,957
Accumulated other comprehensive income (loss)	(3,773)	6,921
Total Stockholders’ Equity	298,150	285,478	$ 251,898
Total Liabilities and Stockholders’ Equity	3,224,710	2,642,634
Parent Company
ASSETS
Cash and cash equivalents	13,605	23,868
Other assets	188	33
Total Assets	298,161	285,478
LIABILITIES
Accrued expenses and other liabilities	11	0
Total Liabilities	11	0
STOCKHOLDERS’ EQUITY
Preferred stock, no par value: Authorized - 1,000,000 shares; None Issued and Outstanding	0	0
Common stock, no par value: Authorized - 30,000,000 shares; Issued and Outstanding - 7,180,155 and 7,325,333 shares, respectively	60,233	68,055
Additional paid-in capital	1,814	1,545
Retained earnings	239,876	208,957
Accumulated other comprehensive income (loss)	(3,773)	6,921
Total Stockholders’ Equity	298,150	285,478
Total Liabilities and Stockholders’ Equity	298,161	285,478
Parent Company | Subsidiary Bank
ASSETS
Investment in subsidiary bank	$ 284,368	$ 261,577