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Shareholder Report
 6 Months Ended
May 31, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Advisors Series Trust
Entity Central Index Key 0001027596
Entity Investment Company Type N-1A
Document Period End Date May 31, 2025
PIA BBB Bond Fund  
Shareholder Report [Line Items]  
Fund Name PIA BBB Bond Fund
Class Name PIA BBB Bond Fund
Trading Symbol PBBBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the PIA BBB Bond Fund for the period of December 1, 2024, to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.pacificincome.com/mutualfund/bbb-bond-fund/. You can also request this information by contacting us at 1-800-251-1970.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-800-251-1970
Additional Information Website https://www.pacificincome.com/mutualfund/bbb-bond-fund/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS?  (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
PIA BBB Bond Fund
$9
0.18%
[1]
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
Updated Performance Information Location [Text Block]
Visit https://www.pacificincome.com/mutualfund/bbb-bond-fund/ for more recent performance information.
Net Assets $ 220,881,449
Holdings Count | $ / shares 311
Investment Company Portfolio Turnover 3.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of May 31, 2025)
Net Assets
$220,881,449
Number of Holdings
311
Portfolio Turnover
3%
Average Credit Quality
BBB
Effective Duration
6.69 years
Weighted Average Maturity
11.00 years
Weighted Average Life
10.69 years
Distribution Yield
3.92%
30-Day SEC Yield
5.28%
30-Day SEC Yield Unsubsidized
5.28%
Holdings [Text Block]
image
Top 10 Issuers
(%)
U.S. Treasury Note/Bond
2.5%
Oracle Corp.
2.4%
AT&T, Inc.
2.2%
Verizon Communications, Inc.
2.2%
CVS Health Corp.
1.7%
Amgen, Inc.
1.6%
Mexico Government International Bond
1.5%
Boeing Co.
1.5%
T-Mobile USA, Inc.
1.5%
Pacific Gas and Electric Co.
1.4%
Credit Breakdown
(%)1
AA
2.6%
A
3.4%
BBB
92.8%
BB
1.2%
[2]
Updated Prospectus Web Address https://www.pacificincome.com/mutualfund/bbb-bond-fund/
PIA MBS Bond Fund  
Shareholder Report [Line Items]  
Fund Name PIA MBS Bond Fund
Class Name PIA MBS Bond Fund
Trading Symbol PMTGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the PIA MBS Bond Fund for the period of December 1, 2024, to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.pacificincome.com/mutualfund/mbs-bond-fund/. You can also request this information by contacting us at 1-800-251-1970.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-800-251-1970
Additional Information Website https://www.pacificincome.com/mutualfund/mbs-bond-fund/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS?  (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
PIA MBS Bond Fund
$14
0.28%
[3]
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.28%
Updated Performance Information Location [Text Block]
Visit https://www.pacificincome.com/mutualfund/mbs-bond-fund/ for more recent performance information.
Net Assets $ 104,759,675
Holdings Count | $ / shares 86
Investment Company Portfolio Turnover 4.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of May 31, 2025)
Net Assets
$104,759,675
Number of Holdings
86
Portfolio Turnover
4%
Average Credit Quality
AA
Effective Duration
6.07 years
Weighted Average Maturity
24.40 years
Weighted Average Life
8.04 years
Distribution Yield
4.20%
30-Day SEC Yield
3.96%
30-Day SEC Yield Unsubsidized
3.93%
Holdings [Text Block]
image
Top 10 Issuers
(%)
FHLMC
37.3%
FNMA
33.1%
GNMA
17.2%
United States Treasury Bill
6.2%
Fidelity Government Portfolio
2.4%
UMBS TBA
1.9%
Invitation Homes Trust
1.4%
CF Hippolyta Issuer LLC
1.3%
SAFCO Auto Receivables Trust
0.5%
BX Trust
0.4%
Credit Breakdown
(%)1
AA
98.7%
A
1.3%
[4]
Updated Prospectus Web Address https://www.pacificincome.com/mutualfund/mbs-bond-fund/
PIA High Yield (MACS) Fund  
Shareholder Report [Line Items]  
Fund Name PIA High Yield (MACS) Fund
Class Name PIA High Yield (MACS) Fund
Trading Symbol PIAMX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the PIA High Yield (MACS) Fund for the period of December 1, 2024, to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.pacificincome.com/mutualfund/pia-high-yield-macs/. You can also request this information by contacting us at 1-800-251-1970.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-800-251-1970
Additional Information Website https://www.pacificincome.com/mutualfund/pia-high-yield-macs/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS?  (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
PIA High Yield (MACS) Fund
$9
0.18%
[5]
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.18%
Updated Performance Information Location [Text Block]
Visit https://www.pacificincome.com/mutualfund/pia-high-yield-macs/ for more recent performance information.
Net Assets $ 178,238,381
Holdings Count | $ / shares 115
Investment Company Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of May 31, 2025)
Net Assets
$178,238,381
Number of Holdings
115
Portfolio Turnover
9%
Average Credit Quality
B
Effective Duration
2.67 years
Weighted Average Maturity
3.90 years
Weighted Average Life
3.88 years
Distribution Yield
8.76%
30-Day SEC Yield
10.34%
30-Day SEC Yield Unsubsidized
10.34%
Holdings [Text Block]
image
Top 10 Issuers
(%)
Fidelity Government Portfolio
3.2%
Veritiv Operating Co.
1.7%
Innophos Holdings, Inc.
1.7%
TKC Holdings, Inc.
1.7%
Rocket Software, Inc.
1.6%
Consolidated Energy Finance SA
1.5%
VistaJet Malta Finance PLC / Vista Management Holding, Inc.
1.5%
Mercer International, Inc.
1.5%
ITT Holdings LLC
1.4%
ION Trading Technologies Sarl
1.4%
Credit Breakdown
(%)1
Aaa
3.0%
Baa
0.0%
Ba
8.0%
B
65.0%
Caa
19.0%
Ca
1.0%
NR
4.0%
[6]
Updated Prospectus Web Address https://www.pacificincome.com/mutualfund/pia-high-yield-macs/
Institutional  
Shareholder Report [Line Items]  
Fund Name PIA High Yield Fund
Class Name PIA High Yield Fund
Trading Symbol PHYSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the PIA High Yield Fund for the period of December 1, 2024, to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.pacificincome.com/mutualfund/high-yield-fund/. You can also request this information by contacting us at 1-800-251-1970.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-800-251-1970
Additional Information Website https://www.pacificincome.com/mutualfund/high-yield-fund/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS?  (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
PIA High Yield Fund
$32
0.65%
[7]
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.65%
Updated Performance Information Location [Text Block]
Visit https://www.pacificincome.com/mutualfund/high-yield-fund/ for more recent performance information.
Net Assets $ 90,530,440
Holdings Count | $ / shares 114
Investment Company Portfolio Turnover 8.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of May 31, 2025)
Net Assets
$90,530,440
Number of Holdings
114
Portfolio Turnover
8%
Average Credit Quality
B
Effective Duration
2.62 years
Weighted Average Maturity
3.80 years
Weighted Average Life
3.80 years
Distribution Yield
8.16%
30-Day SEC Yield
9.71%
30-Day SEC Yield Unsubsidized
9.38%
Holdings [Text Block]
image
Top 10 Issuers
(%)
Fidelity Government Portfolio
6.1%
Consolidated Energy Finance SA
1.7%
Innophos Holdings, Inc.
1.5%
TKC Holdings, Inc.
1.4%
Mercer International, Inc.
1.4%
LABL, Inc.
1.4%
TMS International Corp./DE
1.3%
Veritiv Operating Co.
1.3%
Helios Software Holdings, Inc. / ION Corporate Solutions Finance Sarl
1.3%
NGL Energy Operating LLC / NGL Energy Finance Corp.
1.3%
Credit Breakdown
(%)1
AAA
5.0%
Baa
0.0%
Ba
7.0%
B
64.0%
Caa
19.0%
Ca
1.0%
NR
4.0%
[8]
Updated Prospectus Web Address https://www.pacificincome.com/mutualfund/high-yield-fund/
PIA Short-Term Securities Fund  
Shareholder Report [Line Items]  
Fund Name PIA Short-Term Securities Fund
Class Name PIA Short-Term Securities Fund
Trading Symbol PIASX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the PIA Short-Term Securities Fund for the period of December 1, 2024, to May 31, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at https://www.pacificincome.com/mutualfund/short-term-securities-fund/. You can also request this information by contacting us at 1-800-251-1970.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number 1-800-251-1970
Additional Information Website https://www.pacificincome.com/mutualfund/short-term-securities-fund/
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS?  (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment*
PIA Short-Term Securities Fund
$20
0.39%
[9]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.39%
Updated Performance Information Location [Text Block]
Visit https://www.pacificincome.com/mutualfund/short-term-securities-fund/ for more recent performance information.
Net Assets $ 153,987,242
Holdings Count | $ / shares 115
Investment Company Portfolio Turnover 31.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of May 31, 2025)
Net Assets
$153,987,242
Number of Holdings
115
Portfolio Turnover
31%
Average Credit Quality
A
Effective Duration
1.15 years
Weighted Average Maturity
3.00 years
Weighted Average Life
1.36 years
Distribution Yield
4.55%
30-Day SEC Yield
4.50%
30-Day SEC Yield Unsubsidized
4.47%
Holdings [Text Block]
image
Top 10 Issuers
(%)
United States Treasury Bill
8.4%
BX Trust
7.8%
U.S. Treasury Note/Bond
7.6%
PVOne LLC
2.0%
AEGON Funding Co. LLC
2.0%
CONE Trust 2024-DFW1
2.0%
Quanta Services, Inc.
2.0%
FCI Funding
1.5%
SAFCO Auto Receivables Trust
1.5%
Tesla Auto Lease Trust
1.5%
Credit Breakdown
(%)1
AAA
18.7%
AA
33.0%
A
20.7%
BBB
27.6%
[10]
Updated Prospectus Web Address https://www.pacificincome.com/mutualfund/short-term-securities-fund/
[1]
* Annualized
[2]
1 Bond ratings provide the probability of an issuer defaulting based on the analysis of the issuer’s financial condition and profit potential. Bond rating services are provided by credit rating agencies currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”). Bond ratings start at AAA (denoting the highest investment quality) and usually end at D (meaning payment is in default). Securities not covered by any agency will receive a non-rated (NR) rating.
[3]
* Annualized
[4]
1 Bond ratings provide the probability of an issuer defaulting based on the analysis of the issuer’s financial condition and profit potential. Bond rating services are provided by credit rating agencies currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”). Bond ratings start at AAA (denoting the highest investment quality) and usually end at D (meaning payment is in default). Securities not covered by any agency will receive a non-rated (NR) rating.
[5]
* Annualized
[6]
1 Bond ratings provide the probability of an issuer defaulting based on the analysis of the issuer’s financial condition and profit potential. Bond rating services are provided by credit rating agencies currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”). Bond ratings start at AAA (denoting the highest investment quality) and usually end at D (meaning payment is in default). Securities not covered by any agency will receive a non-rated (NR) rating.
[7]
* Annualized
[8]
1 Bond ratings provide the probability of an issuer defaulting based on the analysis of the issuer’s financial condition and profit potential. Bond rating services are provided by credit rating agencies currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”). Bond ratings start at AAA (denoting the highest investment quality) and usually end at D (meaning payment is in default). Securities not covered by any agency will receive a non-rated (NR) rating.
[9]
* Annualized
[10]
1 Bond ratings provide the probability of an issuer defaulting based on the analysis of the issuer’s financial condition and profit potential. Bond rating services are provided by credit rating agencies currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”). Bond ratings start at AAA (denoting the highest investment quality) and usually end at D (meaning payment is in default). Securities not covered by any agency will receive a non-rated (NR) rating.