DEBT (Details) (USD $)					0 Months Ended																	0 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Jan. 09, 2014 Amended and Restated Credit Facility	Jan. 09, 2014 Line of credit Amended and Restated Credit Facility	Jan. 09, 2014 Line of credit Amended and Restated Credit Facility Revolving Credit Facility Extension_Option	Jan. 09, 2014 Line of credit Amended and Restated Credit Facility London Interbank Offered Rate (LIBOR) Revolving Credit Facility	Jan. 09, 2014 Line of credit Amended and Restated Credit Facility Base Rate	Jan. 09, 2014 Term loan Amended and Restated Credit Facility Extension_Option	Jan. 09, 2014 Term loan Amended and Restated Credit Facility London Interbank Offered Rate (LIBOR)	Jan. 09, 2014 Minimum Amended and Restated Credit Facility Base Rate Revolving Credit Facility	Jan. 09, 2014 Minimum Line of credit Amended and Restated Credit Facility London Interbank Offered Rate (LIBOR) Revolving Credit Facility	Jan. 09, 2014 Minimum Term loan Amended and Restated Credit Facility London Interbank Offered Rate (LIBOR)	Jan. 09, 2014 Minimum Term loan Amended and Restated Credit Facility Base Rate	Jan. 09, 2014 Maximum Amended and Restated Credit Facility Base Rate Revolving Credit Facility	Jan. 09, 2014 Maximum Line of credit Amended and Restated Credit Facility London Interbank Offered Rate (LIBOR) Revolving Credit Facility	Jan. 09, 2014 Maximum Term loan Amended and Restated Credit Facility London Interbank Offered Rate (LIBOR)	Jan. 09, 2014 Maximum Term loan Amended and Restated Credit Facility Base Rate	Jan. 09, 2014 Future Year Period Two Line of credit	Jan. 09, 2014 Future Year Period Two Line of credit Amended and Restated Credit Facility	Jan. 09, 2014 Future Year Period One Line of credit Amended and Restated Credit Facility	Jan. 09, 2014 Interest Rate Swap Cash Flow Hedging	Oct. 31, 2014 Subsequent Event Senior Notes Note Purchase Agreement	Oct. 31, 2014 Subsequent Event Senior Notes Note Purchase Agreement	Oct. 31, 2014 Subsequent Event Senior Notes, Series A Note Purchase Agreement	Oct. 31, 2014 Subsequent Event Senior Notes, Series B Note Purchase Agreement	Oct. 31, 2014 Subsequent Event Senior Notes, Series C Note Purchase Agreement
Debt Instrument [Line Items]
Face amount of debt																							$ 350,000,000	$ 150,000,000	$ 100,000,000	$ 100,000,000
Stated Interest Rate (in percent)																								4.00%	4.00%	5.00%
Partial debt repayment, minimum percentage of principal (in percent)																						5.00%
Full debt repayment percentage of principal plus a Make-Whole Amount (in percent)																						100.00%
Revolving credit facility borrowing limit, maximum borrowing capacity			350,000,000		250,000,000			100,000,000
Maximum leverage ratio of revolving credit facility (in percent)				60.00%
Maximum Leverage Ratio, Material Acquisition Period				65.00%
Minimum fixed charge coverage ratio on revolving credit facility (in percent)																		1.5
Maximum secured leverage ratio on revolving credit facility (in percent)																			40.00%	45.00%
Percent of net proceeds of any additional equity issuances in relation to net proceeds as of Offering				75.00%
Maximum Recourse Indebtedness of Total Asset Value				15.00%
Line of Credit Facility, Allowable Additional Borrowing Capacity			250,000,000
Debt Instrument, Description of Variable Rate Basis						LIBOR	base rate		LIBOR
Debt Instrument, Variable Rate Basis, One							prime rate
Debt Instrument, Basis Spread on Variable Rate										0.35%	1.35%	1.30%	0.30%	0.95%	1.95%	1.90%	0.90%
Debt Instrument, Spread on Variable Rate Basis, Two							0.50%
Debt Instrument, Spread on Variable Rate Basis, Three							1.00%
Minimum Unsecured Interest Coverage Ratio																		175.00%
Debt Instrument, Variable Rate Basis, Two							federal funds rate
Debt Instrument, Variable Rate Basis, Three							Eurodollar
Debt Instrument, Extension Options					2			3
Debt Instrument, Extension Term					6 months			12 months
Line of credit	0	93,000,000	100,000,000
Interest rate on derivative																					3.08%
Maximum Secured Leverage Ratio, Material Acquisition Period																			45.00%	50.00%
Maximum Unsecured Leverage Ratio				60.00%
Maximum Unsecured Leverage Ratio, Material Acquisition Period				65.00%
Minimum Tangible Net Worth				$ 721,160,000
Percentage Limit On Annual Distributions In Relation To Funds From Operations				95.00%