Summary of Significant Accounting Policies (Details) - EBP 001 - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| EBP, Accounting Policy [Line Items] | ||
| Net assets transferred into the Plan | $ 5,894,591 | |
| SPS Commerce, Inc. common stock | ||
| EBP, Accounting Policy [Line Items] | ||
| Concentration of employer's common stock to net assets, percentage | 4.00% | 9.00% |
| X | ||||||||||
- Definition Percentage of investment at fair value held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), to net assets available for benefit representing concentration risk at or above applicable threshold. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of net asset available for benefit transferred to (from) employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from (to) external plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|