XML 78 R67.htm IDEA: XBRL DOCUMENT v3.19.2
Derivative Instruments and Hedging Activities Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Derivative [Line Items]        
Unrealized gain (loss) on derivative instruments $ (4,030) $ 580 $ (6,499) $ 5,109
Designated as Hedging Instrument | Cash Flow Hedging        
Derivative [Line Items]        
Unrealized gain (loss) on derivative instruments $ (4,030) $ 580 $ (6,499) $ 5,109