DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive income - unrealized loss on valuation of swap agreements	$ 800,000	$ 4,300,000
Level 2
Derivatives, Fair Value [Line Items]
Derivative financial instruments	800,000	4,400,000
Fair Value, Measurements, Recurring | Level 2
Derivatives, Fair Value [Line Items]
Derivative financial instruments	808,000
Cash Flow Hedging | Variable-Rate Derivatives, Maturing in October 2012
Derivatives, Fair Value [Line Items]
Derivative, Cap Interest Rate	3.00%
Cash Flow Hedging | Variable Rate Derivatives Maturing in July 2015 [Member]
Derivatives, Fair Value [Line Items]
Derivative, Cap Interest Rate	4.30%
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives, Maturing between November 2012 and December 2022
Derivatives, Fair Value [Line Items]
Number of interest rate swaps (in interest rate swaps)	11
Notional Amount of Interest Rate Cash Flow Hedge Derivatives	181,400,000
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives, Maturing between November 2012 and December 2022 | Minimum
Derivatives, Fair Value [Line Items]
Derivative, Fixed Interest Rate	0.52%
Interest Rate Swap | Cash Flow Hedging | Fixed-Rate Derivatives, Maturing between November 2012 and December 2022 | Maximum
Derivatives, Fair Value [Line Items]
Derivative, Fixed Interest Rate	3.77%
Interest Rate Swap | Cash Flow Hedging | Variable-Rate Derivatives
Derivatives, Fair Value [Line Items]
Notional Amount of Interest Rate Cash Flow Hedge Derivatives	$ 183,300,000
Derivative, Number of Instruments Held	5