LONG-TERM DEBT (Details 2) (USD $)	3 Months Ended			1 Months Ended			1 Months Ended			1 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Accrued and other liabilities	Sep. 30, 2014 Other liabilities	Jun. 30, 2011 Interest rate swap agreement maturing on May 13, 2016	Sep. 30, 2014 Interest rate swap agreement maturing on May 13, 2016	Jun. 30, 2014 Interest rate swap agreement maturing on May 13, 2016	Oct. 31, 2013 Interest rate swap agreement starting in October 2015 and maturing on June 30, 2018	Sep. 30, 2014 Interest rate swap agreement starting in October 2015 and maturing on June 30, 2018	Jun. 30, 2014 Interest rate swap agreement starting in October 2015 and maturing on June 30, 2018	Jan. 31, 2014 Interest rate swap agreement starting in January 2014 and maturing on June 30, 2020
Interest rate swap agreement
Variable interest rate description before hedging of debt				LIBOR			LIBOR			LIBOR
Effective interest rate for hedged variable rate debt (as a percent)				2.09%			2.04%			3.00%
Notional amount of interest rate swap					$ 232,500,000	$ 240,000,000		$ 550,000,000	$ 550,000,000	$ 450,000,000
Amounts expected to be reclassified from OCI to interest expense	4,000,000
Fair value of interest rate swap liability	$ 14,601,000	$ 4,033,000	$ 10,568,000