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Commitments and Contingencies (Summary of Company's Contractual Cash Obligations) (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Time Deposits, Less than 1 Year $ 49,165
Time Deposits, 1 to 3 Years 21,812
Time Deposits, 3 to 5 Years 2,417
Time Deposits, over 5 Years
Time Deposits, Total 73,394
Commitments, Less than 1 Year 49,165
Commitments, 1 to 3 Years 21,812
Commitments, 3 to 5 Years 2,417
Commitments, Over 5 Years
Commitments, Total $ 73,394