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Commitments, Contingencies and Guarantees (Details Textual) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
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Commitments and Contingencies Disclosure [Abstract] |  |
Amount of letters of credit outstanding | $ 18,576 | $ 4,836

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant