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Hedging Activity and Fair Value Measurements - Summary of Fair Value and Carrying Amounts of Long Term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Carrying Value $ 263,944 $ 242,315
Fair Value, Inputs, Level 2 [Member]    
Fair Value 266,906 234,163
Carrying Value $ 247,776 $ 220,709