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COMMITMENTS AND CONTINGENCIES - Options to Purchase or Lease Land and Buildings (Details) - Various Buildings And Land In Cripple Creak, Colorado - Subsequent Event
$ in Millions
1 Months Ended
Mar. 31, 2021
USD ($)
Other Commitments [Line Items]  
Fair Value Of Land Purchases Pending $ 3.4
Land purchase options exercised $ 0.1