3.23.1 html 169 331 1 false 51 0 false 7 false false R1.htm 100000 - Document - Cover page Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DocumentCoverPage Cover page Cover 1 false false R2.htm 100010 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.spplus.com/20230331/taxonomy/role/Role_StatementCondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets Statements 2 false false R3.htm 100020 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_StatementCondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 100030 - Statement - Condensed Consolidated Statements of Income Sheet http://www.spplus.com/20230331/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfIncome Condensed Consolidated Statements of Income Statements 4 false false R5.htm 100040 - Statement - Condensed Consolidated Statements of Comprehensive Income Sheet http://www.spplus.com/20230331/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfComprehensiveIncome Condensed Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 100050 - Statement - Condensed Consolidated Statements of Stockholders' Equity Sheet http://www.spplus.com/20230331/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfStockholdersEquity Condensed Consolidated Statements of Stockholders' Equity Statements 6 false false R7.htm 100060 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://www.spplus.com/20230331/taxonomy/role/Role_StatementCondensedConsolidatedStatementsOfCashFlows Condensed Consolidated Statements of Cash Flows Statements 7 false false R8.htm 100070 - Disclosure - Significant Accounting Policies and Practices Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSignificantAccountingPoliciesAndPractices Significant Accounting Policies and Practices Notes 8 false false R9.htm 100080 - Disclosure - Acquisitions Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureAcquisitions Acquisitions Notes 9 false false R10.htm 100090 - Disclosure - Leases Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeases Leases Notes 10 false false R11.htm 100100 - Disclosure - Revenue Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenue Revenue Notes 11 false false R12.htm 100110 - Disclosure - Legal and Other Commitments and Contingencies Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLegalAndOtherCommitmentsAndContingencies Legal and Other Commitments and Contingencies Notes 12 false false R13.htm 100120 - Disclosure - Other Intangible Assets, net Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureOtherIntangibleAssetsNet Other Intangible Assets, net Notes 13 false false R14.htm 100130 - Disclosure - Goodwill Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureGoodwill Goodwill Notes 14 false false R15.htm 100140 - Disclosure - Borrowing Arrangements Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureBorrowingArrangements Borrowing Arrangements Notes 15 false false R16.htm 100150 - Disclosure - Stock Repurchase Program Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockRepurchaseProgram Stock Repurchase Program Notes 16 false false R17.htm 100160 - Disclosure - Stock-Based Compensation Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockBasedCompensation Stock-Based Compensation Notes 17 false false R18.htm 100170 - Disclosure - Net Income per Common Share Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureNetIncomePerCommonShare Net Income per Common Share Notes 18 false false R19.htm 100180 - Disclosure - Comprehensive Income Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureComprehensiveIncome1 Comprehensive Income Notes 19 false false R20.htm 100190 - Disclosure - Segment Information Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSegmentInformation Segment Information Notes 20 false false R21.htm 100200 - Disclosure - Significant Accounting Policies and Practices (Policies) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSignificantAccountingPoliciesAndPracticesPolicies Significant Accounting Policies and Practices (Policies) Policies http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSignificantAccountingPoliciesAndPractices 21 false false R22.htm 100220 - Disclosure - Acquisitions (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureAcquisitionsTables Acquisitions (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/DisclosureAcquisitions 22 false false R23.htm 100230 - Disclosure - Leases (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeasesTables Leases (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeases 23 false false R24.htm 100240 - Disclosure - Revenue (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueTables Revenue (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenue 24 false false R25.htm 100250 - Disclosure - Other Intangible Assets, net (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureOtherIntangibleAssetsNetTables Other Intangible Assets, net (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureOtherIntangibleAssetsNet 25 false false R26.htm 100260 - Disclosure - Goodwill (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureGoodwillTables Goodwill (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureGoodwill 26 false false R27.htm 100270 - Disclosure - Borrowing Arrangements (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureBorrowingArrangementsTables Borrowing Arrangements (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureBorrowingArrangements 27 false false R28.htm 100280 - Disclosure - Stock Repurchase Program (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockRepurchaseProgramTables Stock Repurchase Program (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockRepurchaseProgram 28 false false R29.htm 100290 - Disclosure - Stock-Based Compensation (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockBasedCompensationTables Stock-Based Compensation (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockBasedCompensation 29 false false R30.htm 100300 - Disclosure - Net Income per Common Share (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureNetIncomePerCommonShareTables Net Income per Common Share (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureNetIncomePerCommonShare 30 false false R31.htm 100310 - Disclosure - Comprehensive Income (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureComprehensiveIncomeTables Comprehensive Income (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/DisclosureComprehensiveIncome1 31 false false R32.htm 100320 - Disclosure - Segment Information (Tables) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSegmentInformationTables Segment Information (Tables) Tables http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSegmentInformation 32 false false R33.htm 100330 - Disclosure - Significant Accounting Policies and Practices - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSignificantAccountingPoliciesAndPracticesNarrativeDetails Significant Accounting Policies and Practices - Narrative (Details) Details 33 false false R34.htm 100340 - Disclosure - Acquisition (Additional Information) (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureAcquisitionAdditionalInformationDetails Acquisition (Additional Information) (Details) Details http://www.spplus.com/20230331/taxonomy/role/DisclosureAcquisitionsTables 34 false false R35.htm 100350 - Disclosure - Acquisition - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureAcquisitionScheduleOfEstimatedFairValuesOfAssetsAcquiredAndLiabilitiesAssumedDetails Acquisition - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) Details 35 false false R36.htm 100360 - Disclosure - Acquisition - Schedule of Other Assets Acquired were Recorded at their Estimated Fair Value (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureAcquisitionScheduleOfOtherAssetsAcquiredWereRecordedAtTheirEstimatedFairValueDetails Acquisition - Schedule of Other Assets Acquired were Recorded at their Estimated Fair Value (Details) Details 36 false false R37.htm 100380 - Disclosure - Leases - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeasesNarrativeDetails Leases - Narrative (Details) Details 37 false false R38.htm 100390 - Disclosure - Leases - Schedule of Components of ROU Assets and Lease Liabilities (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeasesScheduleOfComponentsOfROUAssetsAndLeaseLiabilitiesDetails Leases - Schedule of Components of ROU Assets and Lease Liabilities (Details) Details 38 false false R39.htm 100400 - Disclosure - Leases - Schedule of Components of Lease Cost (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeasesScheduleOfComponentsOfLeaseCostDetails Leases - Schedule of Components of Lease Cost (Details) Details 39 false false R40.htm 100420 - Disclosure - Leases - Schedule of Components of Lease Cost (Parenthetical) (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeasesScheduleOfComponentsOfLeaseCostParentheticalDetails Leases - Schedule of Components of Lease Cost (Parenthetical) (Details) Details 40 false false R41.htm 100430 - Disclosure - Leases - Schedule of Maturities of Lease Liabilities (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeasesScheduleOfMaturitiesOfLeaseLiabilitiesDetails Leases - Schedule of Maturities of Lease Liabilities (Details) Details 41 false false R42.htm 100440 - Disclosure - Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLeasesScheduleOfSupplementalCashFlowInformationRelatedToLeasesDetails Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Details) Details 42 false false R43.htm 100460 - Disclosure - Revenue - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueNarrativeDetails Revenue - Narrative (Details) Details 43 false false R44.htm 100470 - Disclosure - Revenue - Schedule of Performance Obligations (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueScheduleOfPerformanceObligationsDetails Revenue - Schedule of Performance Obligations (Details) Details 44 false false R45.htm 100480 - Disclosure - Revenue - Schedule of Performance Obligations (Details 1) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueScheduleOfPerformanceObligationsDetails1 Revenue - Schedule of Performance Obligations (Details 1) Details 45 false false R46.htm 100490 - Disclosure - Revenue - Schedule of Contract Asset and Liabilities (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueScheduleOfContractAssetAndLiabilitiesDetails Revenue - Schedule of Contract Asset and Liabilities (Details) Details 46 false false R47.htm 100500 - Disclosure - Revenue - Schedule of Contract Assets Balances (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueScheduleOfContractAssetsBalancesDetails Revenue - Schedule of Contract Assets Balances (Details) Details 47 false false R48.htm 100510 - Disclosure - Revenue - Schedule of Contract Liabilities Balances (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueScheduleOfContractLiabilitiesBalancesDetails Revenue - Schedule of Contract Liabilities Balances (Details) Details 48 false false R49.htm 100520 - Disclosure - Revenue - Schedule of Cost of Contracts Expense (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureRevenueScheduleOfCostOfContractsExpenseDetails Revenue - Schedule of Cost of Contracts Expense (Details) Details 49 false false R50.htm 100530 - Disclosure - Legal and Other Commitments and Contingencies - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureLegalAndOtherCommitmentsAndContingenciesNarrativeDetails Legal and Other Commitments and Contingencies - Narrative (Details) Details 50 false false R51.htm 100540 - Disclosure - Other Intangible Assets, net - Components of Intangible Assets, Net (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureOtherIntangibleAssetsNetComponentsOfIntangibleAssetsNetDetails Other Intangible Assets, net - Components of Intangible Assets, Net (Details) Details 51 false false R52.htm 100560 - Disclosure - Other Intangible Assets, net - Summary of Amortization of Other Intangible Assets (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureOtherIntangibleAssetsNetSummaryOfAmortizationOfOtherIntangibleAssetsDetails Other Intangible Assets, net - Summary of Amortization of Other Intangible Assets (Details) Details 52 false false R53.htm 100580 - Disclosure - Goodwill - Schedule of Changes in Carrying Amounts of Goodwill (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureGoodwillScheduleOfChangesInCarryingAmountsOfGoodwillDetails Goodwill - Schedule of Changes in Carrying Amounts of Goodwill (Details) Details 53 false false R54.htm 100590 - Disclosure - Borrowing Arrangements - Schedule of Long-Term Borrowing (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureBorrowingArrangementsScheduleOfLongTermBorrowingDetails Borrowing Arrangements - Schedule of Long-Term Borrowing (Details) Details 54 false false R55.htm 100600 - Disclosure - Borrowing Arrangements - Schedule of Long-Term Borrowing (Parenthetical) (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureBorrowingArrangementsScheduleOfLongTermBorrowingParentheticalDetails Borrowing Arrangements - Schedule of Long-Term Borrowing (Parenthetical) (Details) Details 55 false false R56.htm 100610 - Disclosure - Borrowing Arrangements - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureBorrowingArrangementsNarrativeDetails Borrowing Arrangements - Narrative (Details) Details 56 false false R57.htm 100620 - Disclosure - Stock Repurchase Program - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockRepurchaseProgramNarrativeDetails Stock Repurchase Program - Narrative (Details) Details 57 false false R58.htm 100630 - Disclosure - Stock Repurchase Program - Summary of Share Repurchase Activity (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockRepurchaseProgramSummaryOfShareRepurchaseActivityDetails Stock Repurchase Program - Summary of Share Repurchase Activity (Details) Details 58 false false R59.htm 100640 - Disclosure - Stock Repurchase Program - Summary of Remaining Authorized Repurchase Amounts (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockRepurchaseProgramSummaryOfRemainingAuthorizedRepurchaseAmountsDetails Stock Repurchase Program - Summary of Remaining Authorized Repurchase Amounts (Details) Details 59 false false R60.htm 100650 - Disclosure - Stock-Based Compensation - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockBasedCompensationNarrativeDetails Stock-Based Compensation - Narrative (Details) Details 60 false false R61.htm 100660 - Disclosure - Stock-Based Compensation - Restricted and Performance Stock Units Rollforward (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockBasedCompensationRestrictedAndPerformanceStockUnitsRollforwardDetails Stock-Based Compensation - Restricted and Performance Stock Units Rollforward (Details) Details 61 false false R62.htm 100670 - Disclosure - Stock-Based Compensation - Schedule of Compensation Expense (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureStockBasedCompensationScheduleOfCompensationExpenseDetails Stock-Based Compensation - Schedule of Compensation Expense (Details) Details 62 false false R63.htm 100680 - Disclosure - Net Income per Common Share - Basic and Diluted Net Income per Common Share and Weighted Average Common Shares Outstanding (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureNetIncomePerCommonShareBasicAndDilutedNetIncomePerCommonShareAndWeightedAverageCommonSharesOutstandingDetails Net Income per Common Share - Basic and Diluted Net Income per Common Share and Weighted Average Common Shares Outstanding (Details) Details 63 false false R64.htm 100690 - Disclosure - Net Income per Common Share - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureNetIncomePerCommonShareNarrativeDetails Net Income per Common Share - Narrative (Details) Details 64 false false R65.htm 100700 - Disclosure - Comprehensive Income - Components of Other Comprehensive Income and Income Tax Benefit Allocated (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureComprehensiveIncomeComponentsOfOtherComprehensiveIncomeAndIncomeTaxBenefitAllocatedDetails Comprehensive Income - Components of Other Comprehensive Income and Income Tax Benefit Allocated (Details) Details 65 false false R66.htm 100710 - Disclosure - Comprehensive Income - Components of Accumulated Other Comprehensive Loss (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureComprehensiveIncomeComponentsOfAccumulatedOtherComprehensiveLossDetails Comprehensive Income - Components of Accumulated Other Comprehensive Loss (Details) Details 66 false false R67.htm 100720 - Disclosure - Comprehensive Income - Reclassifications from Accumulated Other Comprehensive Loss (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureComprehensiveIncomeReclassificationsFromAccumulatedOtherComprehensiveLossDetails Comprehensive Income - Reclassifications from Accumulated Other Comprehensive Loss (Details) Details 67 false false R68.htm 100730 - Disclosure - Segment Information - Schedule of Segment Information by Regions (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSegmentInformationScheduleOfSegmentInformationByRegionsDetails Segment Information - Schedule of Segment Information by Regions (Details) Details 68 false false R69.htm 100740 - Disclosure - Segment Information - Schedule of Segment Information by Regions (Parenthetical) (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/Role_DisclosureSegmentInformationScheduleOfSegmentInformationByRegionsParentheticalDetails Segment Information - Schedule of Segment Information by Regions (Parenthetical) (Details) Details 69 false false R70.htm 100750 - Disclosure - Subsequent Events - Narrative (Details) Sheet http://www.spplus.com/20230331/taxonomy/role/DisclosureSubsequentEventsNarrativeDetails Subsequent Events - Narrative (Details) Details 70 false false All Reports Book All Reports [dq-0542-Deprecated-Concept] Concept TreasuryStockShares in us-gaap/2022 used in 2 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. sp-20230331.htm 595 [dq-0542-Deprecated-Concept] Concept TreasuryStockMember in us-gaap/2022 used in 5 facts was deprecated in us-gaap/2023 as of 2023 and should not be used. sp-20230331.htm 1274, 1490, 1562, 1686, 1931 [ix-0514-Hidden-Fact-Eligible-For-Transform] WARN: 6 fact(s) appearing in ix:hidden were eligible for transformation: us-gaap:RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1, us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 - sp-20230331.htm 8 sp-20230331.htm sp-20230331.xsd sp-20230331_cal.xml sp-20230331_def.xml sp-20230331_lab.xml sp-20230331_pre.xml sp-ex31_1.htm sp-ex31_2.htm sp-ex31_3.htm sp-ex32.htm img4375184_0.jpg http://fasb.org/us-gaap/2022 http://xbrl.sec.gov/dei/2022 true true