| Cover Document | Feb. 04, 2020 |
| Cover page. | |
| Amendment Flag | false |
| Entity Central Index Key | 0000026058 |
| Title of 12(b) Security | Common Stock, no par value |
| Entity Address, Address Line One | 4925 Indiana Avenue |
| Entity Address, City or Town | Lisle |
| Entity Address, State or Province | IL |
| Entity Incorporation, State or Country Code | IN |
| Entity File Number | 1-4639 |
| Document Type | 8-K |
| Document Period End Date | Feb. 4, 2020 |
| Entity Registrant Name | CTSÂ CORPORATION |
| City Area Code | 630 |
| Local Phone Number | 577-8800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Tax Identification Number | 35-0225010 |
| Entity Address, Postal Zip Code | 60532 |
| Trading Symbol | CTS |
| Security Exchange Name | NYSE |
