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v3.26.1

Deferred Costs (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Deferred Costs [Roll Forward] |  |
Balance, beginning of period | $ 87,412 | $ 85,914
Incurred deferred costs | 21,510 | 28,618
Amortized deferred costs | (22,722) | (26,009)
Balance, end of period | $ 86,200 | $ 88,523

X
- Definition Deferred costs amortized. + References No definition available. + Details
Name: | spsc_DeferredCostsAmortized
Namespace Prefix: | spsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred costs incurred. + References No definition available. + Details
Name: | spsc_DeferredCostsIncurred
Namespace Prefix: | spsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Deferred Costs + References No definition available. + Details
Name: | spsc_DeferredCostsRollForward
Namespace Prefix: | spsc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The carrying amount of deferred costs. + References No definition available. + Details
Name: | us-gaap_DeferredCostsCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant