| Cover | Sep. 14, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 14, 2021 |
| Entity File Number | 0-15536 |
| Entity Registrant Name | CODORUS VALLEY BANCORP, INC. |
| Entity Central Index Key | 0000806279 |
| Entity Tax Identification Number | 23-2428543 |
| Entity Incorporation, State or Country Code | PA |
| Entity Address, Address Line One | 105 Leader Heights Road |
| Entity Address, Address Line Two | PO Box 2887 |
| Entity Address, City or Town | York |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 17405-2887 |
| City Area Code | 717 |
| Local Phone Number | 747-1519 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $2.50 par value |
| Trading Symbol | CVLY |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
