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Income Taxes (Tables)
 12 Months Ended
Sep. 30, 2022
Income Tax Disclosure [Abstract]  
Earnings Before Income Taxes, and Related Provision for Income Taxes
(a)
Earnings before income taxes, and the related income tax provision were as follows:
 
Year Ended September 30,
   
2022
      2021      2020  
Domestic
   
$
(14,012
) 
    $ 11,354      $ 9,068  
Foreign
   
 
68,329
        79,097        50,225  
    
 
 
     
 
 
     
 
 
  
Total earnings before income taxes
   
$
54,317
        90,451        59,293  
    
 
 
     
 
 
     
 
 
  
Provision (benefit) for income taxes -
                           
Federal -
                           
Current
   
$
(460
) 
    $ 4,431      $ 1,173  
Deferred
   
 
(1,125
) 
      (2,595 )       744  
State and local
   
 
451
       1,163        1,170  
Foreign -
                           
Current
   
 
13,316
        16,305        10,194  
Deferred
   
 
(324
) 
      (260 )       (174 ) 
    
 
 
     
 
 
     
 
 
  
Total income tax provision
   
$
11,858
      $ 19,044      $ 13,107  
    
 
 
     
 
 
     
 
 
  
 
Reconciliation Between the Statutory U.S. Income Tax Rate and Effective Rate Derived by Dividing the Provision for Income Taxes by Earnings Before Income Taxes
(b)
The following is a reconciliation between the statutory U.S. income tax rate and the effective rate derived by dividing the income tax provision by earnings before income taxes: 
 
Year Ended September 30,
   
2022
    
2021
    
2020
  
Computed income taxes at statutory rate
   
$
11,407
    
 
21.0
% 
   $ 18,995       21.0 %    $ 12,452       21.0  % 
Increase (decrease) in taxes resulting from -
                                                 
State and local income taxes
   
 
362
    
 
0.7
       1,204       1.3       773       1.3  
Foreign-Derived Intangible Income tax
   
 
—  
    
 
—  
       (563 )      (0.6 )      (136 )      (0.2 ) 
Global Intangible Low Taxed Income (“GILTI”) tax
   
 
6,924
    
 
12.7
       8,061       8.9       4,970       8.4  
Foreign tax credit
   
 
(6,572
) 
  
 
(12.1
) 
     (7,802 )      (8.6 )      (4,767 )      (8.0 ) 
Foreign tax rate differences
   
 
(1,679
) 
  
 
(3.1
) 
     (869 )      (1.0 )      (534 )      (0.9 ) 
DOJ LeadCare legal matter accrual
   
 
2,100
    
 
3.9
       —         —         —         —    
Uncertain tax position activity
   
 
166
    
 
0.3
       205       0.2       62       0.1  
Valuation allowance
   
 
(197
 )  
 
(0.4
 )     729       0.8       229       0.3  
Stock-based compensation
   
 
825
 
  
 
1.5
 
     (498 )      (0.5 )      41       0.1  
Transaction costs
   
 
—  
    
 
—  
       —         —         548       0.9  
Unrepatriated earnings
 
 
(1,148
)
 
 
(2.1
)
 
 
680
 
 
 
0.8
 
 
 
185
 
 
 
0.3
 
Other, net
   
 
(330
) 
  
 
(0.6
) 
     (1,098 )      (1.2 )      (716 )      (1.2 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
    
$
11,858
    
 
21.8
% 
   $ 19,044       21.1 %    $ 13,107       22.1  % 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Components of Net Deferred Tax Liabilities
(c)
The components of net deferred taxes were as follows:
 
As of September 30,
   
2022
     
2021
  
Deferred tax assets -
                  
Valuation reserves and non-deductible expenses
   
$
4,274
      $ 4,939  
Stock compensation expense not deductible
   
 
2,609
        2,276  
Net operating loss and tax credit carryforwards
   
 
12,108
        12,711  
Intangible asset basis differences and amortization
   
 
1,254
        505  
Unrepatriated earnings
   
 
1,205
        —    
Other
   
 
1,357
       1,512  
    
 
 
     
 
 
  
Subtotal
   
 
22,807
       21,943  
Less valuation allowance
   
 
(1,427
) 
      (1,624 ) 
    
 
 
     
 
 
  
Deferred tax assets
   
 
21,380
        20,319  
    
 
 
     
 
 
  
Deferred tax liabilities -
                  
Property, plant and equipment basis differences and depreciation
   
 
(5,540
) 
      (4,778 ) 
Intangible asset basis differences and amortization
   
 
(6,218
) 
      (7,000 ) 
Unrepatriated earnings
   
 
(922
 )      (865 ) 
    
 
 
     
 
 
  
Deferred tax liabilities
   
 
(12,680
) 
      (12,643 ) 
    
 
 
     
 
 
  
Net deferred tax assets
   
$
8,700
      $ 7,676  
    
 
 
     
 
 
  
 
Unrecognized Tax Benefits
A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows:
 
Year Ended September 30,
   
2022
      2021      2020  
Unrecognized income tax benefits at beginning of year
   
$
700
      $ 568      $ 509  
Additions for tax positions of prior years
   
 
—  
        34        —    
Reductions for tax positions of prior years
   
 
—  
        —          —    
Additions for tax positions of current year
   
 
138
        138        104  
Tax examination and other settlements
   
 
(64
) 
      (40 )       (45 ) 
    
 
 
     
 
 
     
 
 
  
Unrecognized income tax benefits at end of year
   
$
774
      $ 700      $ 568  
    
 
 
     
 
 
     
 
 
  
Schedule Of Global Intangible Low TaxED Income And Foreign Tax Credit
The Company’s GILTI and foreign tax credit details were as follows:
 
Year Ended September 30,
   
2022
      2021      2020  
U.S. GILTI inclusion
   
$
32,971
      $ 38,384      $ 23,666  
Resulting permanent tax expense
   
 
6,924
        8,061        4,970  
Offsetting foreign tax credit
   
 
(6,572
) 
      (7,802 )       (4,767 )