Loans and Leases, Changes in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	$ 66,885	$ 61,007
Provision for/(recapture of) credit losses	7,750	6,057
Charge-offs	(60)	(581)
Recoveries	390	402
Net (charge-offs) / recoveries	330	(179)
Balance at end of year	74,965	66,885
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASC 326 [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year		0
Commercial & Agricultural R/E [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	32,551	38,149
Provision for/(recapture of) credit losses	1,116	762
Charge-offs	0	(170)
Recoveries	170	0
Net (charge-offs) / recoveries	170	(170)
Balance at end of year	33,837	32,551
Commercial & Agricultural R/E [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASC 326 [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year		(6,190)
Construction [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	3,026	1,456
Provision for/(recapture of) credit losses	1,406	(285)
Charge-offs	0	0
Recoveries	0	0
Net (charge-offs) / recoveries	0	0
Balance at end of year	4,432	3,026
Construction [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASC 326 [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year		1,855
Residential & Home Equity [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	7,508	2,847
Provision for/(recapture of) credit losses	211	1,523
Charge-offs	(14)	(25)
Recoveries	65	131
Net (charge-offs) / recoveries	51	106
Balance at end of year	7,770	7,508
Residential & Home Equity [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASC 326 [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year		3,032
Commercial & Agricultural [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	21,705	16,954
Provision for/(recapture of) credit losses	423	4,001
Charge-offs	0	(324)
Recoveries	124	248
Net (charge-offs) / recoveries	124	(76)
Balance at end of year	22,252	21,705
Commercial & Agricultural [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASC 326 [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year		826
Commercial Leases [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	1,924	938
Provision for/(recapture of) credit losses	4,613	357
Charge-offs	0	0
Recoveries	0	0
Net (charge-offs) / recoveries	0	0
Balance at end of year	6,537	1,924
Commercial Leases [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASC 326 [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year		629
Consumer and Other [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year	171	663
Provision for/(recapture of) credit losses	(19)	(301)
Charge-offs	(46)	(62)
Recoveries	31	23
Net (charge-offs) / recoveries	(15)	(39)
Balance at end of year	$ 137	171
Consumer and Other [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | ASC 326 [Member]
Allowance for Credit Losses [Roll Forward]
Balance at beginning of year		$ (152)