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Revolving Credit Facility and Bank Borrowings (Components Of Our Consolidated Debt And Capital Lease Obligations) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Total borrowings $ 120,000 $ 662
Less: Current portion of borrowings 0 662
Total long-term borrowings 120,000 0
Revolving credit facilities    
Debt Instrument [Line Items]    
Total borrowings 120,000 0
Notes payable    
Debt Instrument [Line Items]    
Total borrowings $ 0 $ 662