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Notes Payable and Long Term Debt (Narrative) (Details)
$ in Thousands
3 Months Ended
Dec. 31, 2015
USD ($)
Oct. 15, 2015
CNY (¥)
Oct. 15, 2015
USD ($)
Debt Instrument [Line Items]      
Current line of credit $ 23,000    
Revolving credit facility | Line of credit | Second Amended and Restated Credit Agreement, as amended      
Debt Instrument [Line Items]      
Proceeds from lines of credit 30,000    
Repayments of lines of credit 337,000    
Letters of credit amount outstanding 700    
Unused borrowing capacity 399,300    
Remaining borrowing capacity 373,500    
Long-term line of credit 0    
Revolving credit facility | Line of credit | Second Amended China Credit Facility      
Debt Instrument [Line Items]      
Additional available credit   ¥ 150,000,000 $ 23,000
Capacity available for fully owned subsidiary   ¥ 50,000,000 $ 8,000
Long-term line of credit $ 13,700    
Interest rate, effective percentage 4.35%