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Income Taxes (Tables)
12 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]  
Schedule of income (loss) before income taxes
For the Years Ended June 30
   
2018
   
2017
   
2016
 
Domestic
      $ 19,819         $ 18,015         $ 2,027    
Foreign
        68,251           62,528           74,734    
Income (loss) before income taxes
      $ 88,070         $ 80,543         $ 76,761    
 
Schedule of components of the provision for income taxes
For the Years Ended June 30
   
2018
   
2017
   
2016
 
Current provision (benefit):                                      
Federal
      $ 81         $ 383         $ (2,889)    
State and local
        1,744           724           (474)    
Foreign
        15,268           14,839           20,168    
Total current provision
        17,093           15,946           16,805    
Deferred provision (benefit):                                      
Federal
        2,746           4,675           (2,985)    
State and local
        2,156           251           911    
Foreign
        769           (833)           (989)    
Change in valuation allowance–domestic
                            (19,588)    
Change in valuation allowance–foreign
        423           (4,111)           (121)    
Total deferred provision
        6,094           (18)           (22,772)    
Provision (benefit) for income taxes
      $ 23,187         $ 15,928         $ (5,967)    
 
Schedule of reconciliations of the Federal statutory rate to the Company's effective tax rate
For the Years Ended June 30
   
2018
   
2017
   
2016
 
Federal income tax rate
        28.1%           35.0%           35.0%    
State and local taxes, net of federal benefit
        1.5           0.9           0.2    
Foreign income tax rates
        (1.5)           (6.8)           (5.5)    
Foreign incentive tax rates
        (3.3)           (3.1)           (4.5)    
Domestic tax on foreign income
                  2.7           2.7    
Changes in uncertain tax positions
        1.1           1.6           (4.9)    
Permanent items
        0.5           (0.9)           1.5    
Exercise of employee stock options
        (4.3)           (3.8)           (4.6)    
Mandatory toll charge from Tax Act
        0.5                        
Reduction of domestic deferred tax assets
        2.6                        
Reduction of foreign deferred tax assets
        1.3                        
Recognition of foreign tax credits
        (0.7)                        
Reclassification from accumulated other comprehensive income
        0.6                        
Release of foreign valuation allowance
                  (5.1)              
Release of domestic valuation allowance
                            (27.8)    
Other
        (0.1)           (0.7)           0.1    
Effective tax rate
        26.3%           19.8%           (7.8)%    
 
Schedule of the tax effects of significant temporary differences that comprise deferred tax assets and liabilities
As of June 30
   
2018
   
2017
 
Deferred tax assets:                          
Employee related accruals
      $ 4,952         $ 7,146    
Inventory
        3,953           4,851    
Environmental remediation
        1,341           2,280    
Net operating loss carry forwards–domestic
        1,577           4,893    
Net operating loss carry forwards–foreign
        3,243           4,023    
Other
        9,986           11,139    
          25,052           34,332    
Valuation allowance
        (861)           (438)    
          24,191           33,894    
Deferred tax liabilities:                          
Property, plant and equipment and intangible assets
        (8,957)           (9,671)    
Other
        (1,906)           (2,004)    
          (10,863)           (11,675)    
Net deferred tax asset
      $ 13,328         $ 22,219    
 
Schedule of deferred taxes included in the line items of the consolidated balance sheets
As of June 30
   
2018
   
2017
 
Other assets
      $ 15,424         $ 23,269    
Other liabilities
        (2,096)           (1,050)    
        $ 13,328         $ 22,219    
 
Schedule of the valuation allowance for deferred tax assets
As of June 30
   
2018
   
2017
   
2016
 
Balance at beginning of period
      $ 438         $ 4,614         $ 26,622    
Provision for income taxes
        423           (4,111)           (19,709)    
Net operating loss utilization
                  (65)           (2,299)    
Balance at end of period
      $ 861         $ 438         $ 4,614    
 
Schedule of the reconciliation of the beginning and ending amount of unrecognized tax benefits
As of June 30
   
2018
   
2017
   
2016
 
Unrecognized tax benefits–beginning of period
      $ 6,553         $ 4,946         $ 8,078    
Tax position changes–current period
        1,749           1,490           472    
Tax position changes–prior periods, net of settlements with tax authorities
        (994)                     188    
Lapse of statute of limitations
                  (391)           (3,700)    
Translation
        (308)           508           (92)    
Unrecognized tax benefits–end of period
        7,000           6,553           4,946    
Interest and penalties–end of period
        633           449           308    
Total liabilities related to uncertain tax positions
      $ 7,633         $ 7,002         $ 5,254