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Fair Value Measurements - Fair Value of Assets and Liabilities (Details) - Interest Rate Swap [Member] - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Derivatives, Fair Value [Line Items]    
Derivative assets $ 572 $ 2,539
Derivative liabilities 7,943 1,135
Fair Value, Inputs, Level 2 [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 572 2,539
Derivative liabilities $ 7,943 $ 1,135