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Organization, Basis of Presentation and Recent Accounting Pronouncements (Recent Accounting Pronouncements) (Details 1) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Item Effected [Line Items]    
Other current assets $ 939 $ 1,400
Accounts payable and accrued liabilities 433,672 507,701
Current portion of lease liabilities 87,652 92,714
Other Liabilities 75,552 27,223
Lease Liabilities $ 451,874 $ 477,004