Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Accumulated Other Comprehensive Income (Details)

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Derivative Instruments and Hedging Activities - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss)    
Beginning balance $ 8,126 $ 1,210
Amount reclassified to income (2,118) 1,379
Net change in unrealized gains or losses 444 (1,838)
Ending balance $ 6,452 $ 751