DERIVATIVE FINANCIAL INSTRUMENTS (Details Textual) - Designated as Hedging Instrument	Sep. 30, 2015 USD ($) swap	Mar. 31, 2015 USD ($) swap	Dec. 31, 2014 USD ($) swap	Aug. 31, 2014 USD ($) swap	Dec. 31, 2013 USD ($) swap	May. 31, 2012 USD ($)
Interest Rate Swap
Number of interest rate derivatives held | swap		2	6	2	6
Notional Amount	$ 175,000,000	$ 50,000,000	$ 175,000	$ 50,000,000	$ 175,000
Terminated Interest Rate Swap
Notional Amount	$ 100,000,000
Number of instruments terminated | swap	4	4
Cap 1
Notional Amount	$ 7,500,000					$ 7,500,000
Cap 2
Notional Amount	8,000,000					$ 8,000,000
Cap 3
Notional Amount	25,000,000			25,000,000
Cap 4
Notional Amount	$ 10,000,000			$ 10,000,000