DERIVATIVE INSTRUMENTS HEDGING AND NON-HEDGING ACTIVITIES (Details 1) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Derivative Financial Instruments, Notional Amount	$ 510,000,000	$ 5,000,000
Derivative Financial Instruments, Fair value	23,046,741	8,624,815
Derivative Financial Instruments, Notional Amount	0	35,000,000
Derivative Financial Instruments, Fair value	0	(283,754)
Interest Rate Swap [Member]
Derivative Financial Instruments, Notional Amount	485,000,000	0
Derivative Financial Instruments, Fair value	5,770,974	0
Derivative Financial Instruments, Notional Amount	0	35,000,000
Derivative Financial Instruments, Fair value	0	(283,754)
Derivative Financial Instruments, Fixed Pay Rate	1.79%	0.66%
Derivative Financial Instruments, Maturity Years	6 years 7 months 6 days	3 years 1 month 6 days
Derivative Financial Instruments, Forward Starting	51.50%	0.00%
Interest Rate Swap [Member] | Less than 3 years [Member]
Derivative Financial Instruments, Notional Amount	135,000,000
Derivative Financial Instruments, Fair value	388,972
Derivative Financial Instruments, Notional Amount		15,000,000
Derivative Financial Instruments, Fair value		(53,437)
Derivative Financial Instruments, Fixed Pay Rate	0.56%	0.51%
Derivative Financial Instruments, Maturity Years	2 years 9 months 18 days	2 years 7 months 6 days
Derivative Financial Instruments, Forward Starting	0.00%	0.00%
Interest Rate Swap [Member] | Greater than 3 years and less than 5 years [Member]
Derivative Financial Instruments, Notional Amount		20,000,000
Derivative Financial Instruments, Fair value		(230,317)
Derivative Financial Instruments, Fixed Pay Rate		0.78%
Derivative Financial Instruments, Maturity Years		3 years 6 months
Derivative Financial Instruments, Forward Starting		0.00%
Interest Rate Swap [Member] | Greater than 5 years and less than 7 years [Member]
Derivative Financial Instruments, Notional Amount	100,000,000
Derivative Financial Instruments, Fair value	(678,652)
Derivative Financial Instruments, Fixed Pay Rate	1.69%
Derivative Financial Instruments, Maturity Years	5 years 1 month 6 days
Derivative Financial Instruments, Forward Starting	0.00%
Interest Rate Swap [Member] | Greater than 7 years and less than 10 years [Member]
Derivative Financial Instruments, Notional Amount	150,000,000
Derivative Financial Instruments, Fair value	2,864,274
Derivative Financial Instruments, Fixed Pay Rate	2.34%
Derivative Financial Instruments, Maturity Years	8 years 1 month 6 days
Derivative Financial Instruments, Forward Starting	100.00%
Interest Rate Swap [Member] | Greater than 10 years [Member]
Derivative Financial Instruments, Notional Amount	100,000,000
Derivative Financial Instruments, Fair value	$ 3,196,380
Derivative Financial Instruments, Fixed Pay Rate	2.71%
Derivative Financial Instruments, Maturity Years	11 years 1 month 6 days
Derivative Financial Instruments, Forward Starting	100.00%