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Supplemental Cash Flow Information (Summary of Non-Cash Transactions) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]    
Accrued property construction costs $ 11,880 $ 9,800
Right-of-use assets exchanged for operating lease liabilities 448 43,258
Increase in debt, net associated with the acquisition of real estate and land $ 17,952 $ 0