Derivative Instruments and Hedging Activities - Derivative Assets and Liabilities and the Effects of Offsetting (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative asset, gross	$ 1,979	$ 2,516	[1]
Derivative asset, gross liability	(583)	(813)
Derivative asset, net	1,396	1,703
Cash collateral (received) pledged	0	0
Derivative asset, net amount recognized in balance sheet	1,396	1,703
Derivative liability, gross	(4,995)	(844)	[1]
Derivative liability, gross asset	583	813
Derivative liability, net	(4,412)	(31)
Cash collateral (received) pledged	0	0
Derivative liability, net amount recognized in balance sheet	$ (4,412)	$ (31)

[1] Certain immaterial amounts have been revised to correct the classification of derivatives.