Short-Term Borrowings And Long-Term Debt (Summary Of Long-Term Debt) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Finance lease liabilities	$ 1,322	$ 0
Total long-term debt	81,632	115,310
Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	10,310	10,310
FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	70,000	105,000
Due April 2019, 1.64% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 0	$ 10,000
FHLBP due date	2019-04
Interest rate	1.64%	1.64%
Due June 2019, 1.64% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 0	$ 5,000
FHLBP due date	2019-06
Interest rate	1.64%	1.64%
Due June 2019, 2.10% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 0	$ 5,000
FHLBP due date	2019-06
Interest rate	2.10%	2.10%
Due December 2019, 1.89% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 0	$ 15,000
FHLBP due date	2019-12
Interest rate	1.89%	1.89%
Due March 2020, 1.86% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 10,000	$ 10,000
FHLBP due date	2020-03
Interest rate	1.86%	1.86%
Due June 2020, 1.87% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 15,000	$ 15,000
FHLBP due date	2020-06
Interest rate	1.87%	1.87%
Due June 2020, 2.70% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 10,000	$ 10,000
FHLBP due date	2020-06
Interest rate	2.70%	2.70%
Due June 2021, 2.81% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 10,000	$ 10,000
FHLBP due date	2021-06
Interest rate	2.81%	2.81%
Due June 2021, 2.14% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 15,000	$ 15,000
FHLBP due date	2021-06
Interest rate	2.14%	2.14%
Due May 2022, 2.93% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 10,000	$ 10,000
FHLBP due date	2022-05
Interest rate	2.93%	2.93%
Due 2034, 2.26%, floating rate based on 3 month LIBOR plus 2.02%, callable quarterly [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 3,093	$ 3,093
Interest rate	3.91%
Long-term debt year due	2034
Due 2034, 2.26%, floating rate based on 3 month LIBOR plus 2.02%, callable quarterly [Member] | LIBOR [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
3 month LIBOR plus rate	2.02%
Due 2036, 1.78% floating rate based on 3 month LIBOR plus 1.54%, callable quarterly [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 7,217	$ 7,217
Interest rate	3.53%
Long-term debt year due	2036
Due 2036, 1.78% floating rate based on 3 month LIBOR plus 1.54%, callable quarterly [Member] | LIBOR [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
3 month LIBOR plus rate	1.54%