Derivative Instruments and Hedging Activities (Details Textual 1) (Forward Starting Interest Rate Swap Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Forward Starting Interest Rate Swap Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 505	$ 500	$ 1,515	$ 1,500