v3.26.1
EMPLOYEE BENEFIT PLANS - Schedule of Plan assets and benefit obligation of the defined benefit plans (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Change in benefit obligation:      
Benefit obligation at end of fiscal year $ 6,527    
Amounts recognized in the statement of financial position consist of:      
Non-Current Assets 1,016    
Pension Plan      
Change in benefit obligation:      
Benefit obligation at beginning of fiscal year 17,067 $ 16,099  
Interest cost 263 883 $ 867
Benefits paid (543) (1,095)  
Benefits paid related to pension termination (15,784) 0  
Actuarial (gain) loss (1,003) 1,180  
Benefit obligation at end of fiscal year 0 17,067 16,099
Change in plan assets:      
Fair value of plan assets at beginning of fiscal year 22,275 19,283  
Actual return on plan assets 152 4,087  
Company contributions 0 0  
Benefits paid (543) (1,095)  
Benefits paid related to pension termination (15,784) 0  
Return of excess plan assets (6,100) 0  
Fair value of plan assets at end of fiscal year 0 22,275 19,283
Projected benefit obligation in excess of plan assets 0 5,208  
Amounts recognized in the statement of financial position consist of:      
Non-Current Assets 0 5,208  
Accrued liabilities 0 0  
Other liabilities (long-term) 0 0  
Total Liabilities 0 5,208  
Net actuarial losses 0 (2,229)  
Deferred taxes 0 468  
Total accumulated other comprehensive loss, net of tax 0 (1,761)  
Net amount recognized at September 30, 0 3,447  
Accumulated benefit obligations 0 17,067  
Information for plans with accumulated benefit obligations in excess of plan assets:      
ABO 0 17,066  
PBO 0 17,066  
Fair value of plan assets 0 22,274  
Supplemental Employee Retirement Plan      
Change in benefit obligation:      
Benefit obligation at beginning of fiscal year 10,173 10,308  
Interest cost 362 475 454
Benefits paid (1,845) (1,848)  
Benefits paid related to pension termination 0 0  
Actuarial (gain) loss 878 1,238  
Benefit obligation at end of fiscal year 9,568 10,173 10,308
Change in plan assets:      
Fair value of plan assets at beginning of fiscal year 0 0  
Actual return on plan assets 0 0  
Company contributions 1,845 1,848  
Benefits paid (1,845) (1,848)  
Benefits paid related to pension termination 0 0  
Return of excess plan assets 0  
Fair value of plan assets at end of fiscal year 0 0 $ 0
Projected benefit obligation in excess of plan assets (9,568) (10,173)  
Amounts recognized in the statement of financial position consist of:      
Non-Current Assets 0 0  
Accrued liabilities (1,764) (1,774)  
Other liabilities (long-term) (7,804) (8,399)  
Total Liabilities (9,568) (10,173)  
Net actuarial losses 6,972 5,979  
Deferred taxes (1,669) (2,885)  
Total accumulated other comprehensive loss, net of tax 5,303 3,094  
Net amount recognized at September 30, (4,265) (7,079)  
Accumulated benefit obligations 9,568 10,173  
Information for plans with accumulated benefit obligations in excess of plan assets:      
ABO 9,568 10,173  
PBO 9,568 10,173  
Fair value of plan assets $ 0 $ 0