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Derivative Instrument and Hedging Activity - Accumulated Derivative Instrument Gain (Loss) Activity (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance at beginning of period $ 167,263 $ 168,331
Balance at end of period 152,476 214,856
Accumulated Derivative Instrument Gain    
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]    
Balance at beginning of period (179) 900
Net change associated with current period hedging transactions (2,135) (1,015)
Balance at end of period $ (2,314) $ (115)