v3.25.1

Preferred Units - Schedule of Preferred Units Outstanding (Details) | Mar. 31, 2025 shares
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Preferred Units Outstanding [Roll Forward] |
Beginning balance (in shares) | 180,000
Ending balance (in shares) | 180,000

X
- Definition The number of preferred units outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-5 + Details
Name: | us-gaap_PreferredUnitsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Units Outstanding + References No definition available. + Details
Name: | usac_PreferredUnitsOutstandingRollForward
Namespace Prefix: | usac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration