Consolidated Statement of Changes in Stockholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Purchase of treasury shares (in shares)	1,253,725	436,619
Dividends on common share (in dollars per share)	$ 0.88	$ 0.84	$ 0.84
Common Stock [Member]
Shares issued in acquisition of Empire Bancorp, Inc. (in shares)			2,557,028
Common shares released from Employee Benefit Trust, shares (in shares)	17,964	22,936	145,447
Restricted stock unit awards vested, shares (in shares)	303,636	261,628
Exercise of stock options, shares (in shares)			281,636
Treasury Stock [Member]
Purchase of treasury shares (in shares)	1,253,725	436,619	142,405
Repurchase of shares to satisfy tax obligation, shares (in shares)	99,873	74,510	77,611