| Component: (Network and Table) | |
|---|---|
| Network | 053 - Disclosure - Note I - Business Segment Information - Components of Customer Sales Determined Based on the Location of Customers (Details) (http://www.gormanrupp.com/20161231/role/statement-note-i-business-segment-information-components-of-customer-sales-determined-based-on-the-location-of-customers-details) |
| Table | Statement [Table] |
| Reporting Entity [Axis] | 0000042682 (http://www.sec.gov/CIK) |
| Scenario [Axis] | Scenario, Unspecified [Domain] |
| Statement [Line Items] | Period [Axis] | ||||||||
|---|---|---|---|---|---|---|---|---|---|
2016-01-01 - 2016-12-31 | 2015-01-01 - 2015-12-31 | 2014-01-01 - 2014-12-31 | |||||||
| Geographical [Axis] | Geographical [Axis] | Geographical [Axis] | |||||||
| UNITED STATES | Foreign Countries [Member] | Geographical [Domain] | UNITED STATES | Foreign Countries [Member] | Geographical [Domain] | UNITED STATES | Foreign Countries [Member] | Geographical [Domain] | |
Revenues | 382,071,000 | 406,150,000 | 434,925,000 | ||||||
Revenues, Percent | |||||||||