Short-Term Borrowings And Long-Term Debt (Summary Of Long-Term Debt) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total long-term debt	$ 135,310	$ 130,310
FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	125,000	120,000
Due March 2018, 1.17% [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	2018-03
Interest rate		1.17%
Due June 2018, 1.87% [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	2018-06
Interest rate		1.87%
Due June 2018, 1.41% [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	2018-06
Interest rate		1.41%
Due November 2018, 1.62% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 5,000	$ 5,000
FHLBP due date	2018-11
Interest rate	1.62%	1.62%
Due December 2018, 1.60% [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	2018-12
Interest rate	1.60%	1.60%
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	$ 10,000	$ 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	$ 5,000	$ 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	$ 5,000	$ 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	$ 15,000	$ 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	$ 0
FHLBP due date	2020-06
Interest rate	2.70%
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 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	$ 0
FHLBP due date	2021-06
Interest rate	2.81%
Due May 2022, 2.98% [Member] | FHLBP [Member] | Federal Home Loan Bank [Member] | PeoplesBank, A Codorus Valley Company [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 10,000	0
FHLBP due date	2022-05
Interest rate	2.98%
Due 2034, 4.35%, floating rate based on 3 month LIBOR plus 2.02%, callable quarterly | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 3,093	3,093
Interest rate	4.35%
Long-term debt year due	2034
Due 2034, 4.35%, floating rate based on 3 month LIBOR plus 2.02%, callable quarterly | LIBOR [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
3 month LIBOR plus rate	2.02%
Due 2036, 3.88% floating rate based on 3 month LIBOR plus 1.54%, callable quarterly | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Total long-term debt	$ 7,217	$ 7,217
Interest rate	3.88%
Long-term debt year due	2036
Due 2036, 3.88% floating rate based on 3 month LIBOR plus 1.54%, callable quarterly | LIBOR [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
3 month LIBOR plus rate	1.54%