Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity, Class of Treasury Stock [Line Items]
Amount of treasury share repurchases	194,000		125,000
Amount of treasury repurchases	$ 9,479		$ 4,322
Trust preferred securities included in Tier 1 Capital	22,000	$ 22,000
Bank [Member]
Equity, Class of Treasury Stock [Line Items]
Dividends paid by Bank to Bancorp	$ 53,240	$ 45,732	$ 43,139
2021 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Amount of treasury share repurchases	194,162
Average prices of treasury repurchases	$ 48.82
Amount of treasury repurchases	$ 9,500
2023 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Authorized amount (in shares)	850,000
Authorized amount as a percentage of total common stock	5.00%