Derivatives (Detail Textuals) - Options - Cash flow hedges $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)
Derivative [Line Items]
Other comprehensive income (loss), unrealized gains (losses) on derivatives	$ 1,909	$ (2,994)
Accumulated other comprehensive income (loss) of unrecognized gains (losses) on derivative instruments	4,536	4,536
Unrecognized gains (losses) on derivative instruments recorded in earnings within the next twelve months		(1,196)
Realized losses on derivative instruments	$ (1,095)	$ (1,941)