XML 70 R55.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Note I - Business Segment Information - Net Sales from External Customers by Product Category (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues | $ 382,071 | $ 406,150 | $ 434,925
Pumps and Pump Systems [Member] |  |  |
Revenues | 328,973 | 352,652 | 379,626
Repairs and Other [Member] |  |  |
Revenues | $ 53,098 | $ 53,498 | $ 55,299

X
- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ProductOrServiceAxis=grc_PumpsAndPumpSystemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ProductOrServiceAxis=grc_RepairsAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |