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Investment in Unconsolidated Affiliate - Narrative (Details) - Investment in JV - USD ($)
$ in Thousands
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]          
Carrying Value $ 4,528 $ 4,494 $ 4,371 $ 4,338 $ 4,000
Ownership Percentage 28.00% 28.00%     28.00%