Revenue - Summary of Disaggregation of Total Net Sales by End Market and Geographic Location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 172,825	$ 168,182	$ 515,818	$ 496,963
United States [Member]
Disaggregation of Revenue [Line Items]
Net sales	133,638	124,434	392,025	366,030
Non-US [Member]
Disaggregation of Revenue [Line Items]
Net sales	39,187	43,748	123,793	130,933
Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	36,225	30,939	104,973	99,054
Fire Market [Member]
Disaggregation of Revenue [Line Items]
Net sales	31,955	31,591	96,660	92,742
Agriculture [Member]
Disaggregation of Revenue [Line Items]
Net sales	22,479	20,496	62,100	62,282
Construction [Member]
Disaggregation of Revenue [Line Items]
Net sales	17,661	22,255	58,406	65,592
Municipal [Member]
Disaggregation of Revenue [Line Items]
Net sales	26,339	24,279	78,170	70,668
Petroleum [Member]
Disaggregation of Revenue [Line Items]
Net sales	6,140	7,004	20,040	18,351
OEM [Member]
Disaggregation of Revenue [Line Items]
Net sales	12,338	11,579	34,359	31,420
Repair Parts [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 19,688	$ 20,039	$ 61,110	$ 56,854

GORMAN RUPP CO 10-Q