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Consolidated Statements of Cash Flows (Parenthetical) - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Statement of Cash Flows [Abstract]    
Restricted cash pledged as collateral on interest rate swaps $ 1,900,000 $ 950,000
Restricted cash and cash equivalents $ 0 $ 5,800,000