3.26.1 html 226 220 1 true 32 0 false 6 false false R1.htm 75000 - Document - Document and Entity Information Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 75010 - Statement - Condensed Consolidated Statements of Income (Unaudited) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfIncomeUnaudited Condensed Consolidated Statements of Income (Unaudited) Statements 2 false false R3.htm 75020 - Statement - Condensed Consolidated Balance Sheets (Unaudited) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_StatementCondensedConsolidatedBalanceSheetsUnaudited Condensed Consolidated Balance Sheets (Unaudited) Statements 3 false false R4.htm 75030 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_StatementCondensedConsolidatedBalanceSheetsParentheticalUnaudited Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) Statements 4 false false R5.htm 75040 - Statement - Condensed Consolidated Statements of Shareholders' Equity (Unaudited) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfShareholdersEquityUnaudited Condensed Consolidated Statements of Shareholders' Equity (Unaudited) Statements 5 false false R6.htm 75050 - Statement - Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfShareholdersEquityUnauditedParenthetical Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parenthetical) Statements 6 false false R7.htm 75060 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited Condensed Consolidated Statements of Cash Flows (Unaudited) Statements 7 false false R8.htm 995410 - Disclosure - Pay vs Performance Disclosure Sheet http://xbrl.sec.gov/ecd/role/PvpDisclosure Pay vs Performance Disclosure Notes 8 false false R9.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 9 false false R10.htm 995455 - Disclosure - Condensed Consolidated Financial Information Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureCondensedConsolidatedFinancialInformation Condensed Consolidated Financial Information Notes 10 false false R11.htm 995465 - Disclosure - New Accounting Pronouncements Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureNewAccountingPronouncements New Accounting Pronouncements Notes 11 false false R12.htm 995485 - Disclosure - Business Combinations Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureBusinessCombinations Business Combinations Notes 12 false false R13.htm 995505 - Disclosure - Revenue Recognition Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognition Revenue Recognition Notes 13 false false R14.htm 995515 - Disclosure - Earnings Per Share Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureEarningsPerShare Earnings Per Share Notes 14 false false R15.htm 995525 - Disclosure - Inventories Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureInventories Inventories Notes 15 false false R16.htm 995535 - Disclosure - Goodwill and Intangible Assets Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssets1 Goodwill and Intangible Assets Notes 16 false false R17.htm 995545 - Disclosure - Segment Reporting Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureSegmentReporting Segment Reporting Notes 17 false false R18.htm 995565 - Disclosure - Segment Reporting (Policies) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureSegmentReportingPolicies Segment Reporting (Policies) Policies http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureNewAccountingPronouncements 18 false false R19.htm 995595 - Disclosure - Revenue Recognition (Tables) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognition 19 false false R20.htm 995605 - Disclosure - Inventories (Tables) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureInventoriesTables Inventories (Tables) Tables http://www.mgrc.com/20260630/taxonomy/role/DisclosureInventories 20 false false R21.htm 995615 - Disclosure - Earnings Per Share (Tables) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureEarningsPerShareTables Earnings Per Share (Tables) Tables http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureEarningsPerShare 21 false false R22.htm 995625 - Disclosure - Goodwill and Intangible Assets (Tables) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsTables Goodwill and Intangible Assets (Tables) Tables http://www.mgrc.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssets1 22 false false R23.htm 995635 - Disclosure - Segment Reporting (Tables) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureSegmentReportingTables Segment Reporting (Tables) Tables http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureSegmentReporting 23 false false R24.htm 995655 - Disclosure - Business Combinations - Additional Information (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureBusinessCombinationsAdditionalInformationDetail Business Combinations - Additional Information (Detail) Details 24 false false R25.htm 995745 - Disclosure - Revenue Recognition - Additional Information (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognitionAdditionalInformationDetail Revenue Recognition - Additional Information (Detail) Details 25 false false R26.htm 995765 - Disclosure - Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureRevenueRecognitionSummaryOfDisaggregatesCompanySRevenueByLeaseAndNonLeaseDetail Revenue Recognition - Summary of Disaggregates the Company's Revenue by Lease and Non Lease (Detail) Details 26 false false R27.htm 995775 - Disclosure - Earnings Per Share - Weighted-Average Number of Shares of Common Stock Used to Calculate Basic and Diluted Earnings Per Share (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureEarningsPerShareWeightedAverageNumberOfSharesOfCommonStockUsedToCalculateBasicAndDilutedEarningsPerShareDetail Earnings Per Share - Weighted-Average Number of Shares of Common Stock Used to Calculate Basic and Diluted Earnings Per Share (Detail) Details 27 false false R28.htm 995785 - Disclosure - Earnings Per Share - Additional Information (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureEarningsPerShareAdditionalInformationDetail Earnings Per Share - Additional Information (Detail) Details 28 false false R29.htm 995795 - Disclosure - Earnings Per Share - Summary of Share Repurchase Activities (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureEarningsPerShareSummaryOfShareRepurchaseActivitiesDetail Earnings Per Share - Summary of Share Repurchase Activities (Detail) Details 29 false false R30.htm 995805 - Disclosure - Earnings Per Share - Summary of Share Repurchase Activities (Parenthetical) (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureEarningsPerShareSummaryOfShareRepurchaseActivitiesParentheticalDetail Earnings Per Share - Summary of Share Repurchase Activities (Parenthetical) (Detail) Details 30 false false R31.htm 995815 - Disclosure - Inventories - Summary of Carrying Value of Inventories (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureInventoriesSummaryOfCarryingValueOfInventoriesDetail Inventories - Summary of Carrying Value of Inventories (Detail) Details 31 false false R32.htm 995825 - Disclosure - Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsSummaryOfIntangibleAssetsDetail Goodwill and Intangible Assets - Summary of Intangible Assets (Detail) Details 32 false false R33.htm 995835 - Disclosure - Goodwill and Intangible Assets - Summary of Goodwill (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsSummaryOfGoodwillDetail Goodwill and Intangible Assets - Summary of Goodwill (Detail) Details 33 false false R34.htm 995845 - Disclosure - Goodwill and Intangible Assets - Additional Information (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsAdditionalInformationDetail Goodwill and Intangible Assets - Additional Information (Detail) Details 34 false false R35.htm 995855 - Disclosure - Segment Reporting - Additional Information (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureSegmentReportingAdditionalInformationDetail Segment Reporting - Additional Information (Detail) Details 35 false false R36.htm 995865 - Disclosure - Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureSegmentReportingSummarizedFinancialInformationForCompanySReportableSegmentsDetail Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Detail) Details 36 false false R37.htm 995875 - Disclosure - Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/Role_DisclosureSegmentReportingSummarizedFinancialInformationForCompanySReportableSegmentsParentheticalDetail Segment Reporting - Summarized Financial Information for Company's Reportable Segments (Parenthetical) (Detail) Details 37 false false R38.htm 995885 - Disclosure - Subsequent Event - Additional Information (Detail) Sheet http://www.mgrc.com/20260630/taxonomy/role/DisclosureSubsequentEventAdditionalInformationDetail Subsequent Event - Additional Information (Detail) Details 38 false false All Reports Book All Reports mgrc-20260630.htm mgrc-20260630.xsd http://fasb.org/srt/2026 http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ecd/2026 false false