Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment revenue information
Rental revenue	$ 226,832	$ 195,332	$ 662,822	$ 543,219
Tenant reimbursements	8,275	5,107	20,872	15,619
Other revenue	606	1,642	2,238	5,207
Total revenue	235,713	202,081	685,932	564,045
Apparel
Segment revenue information
Rental revenue	4,922	3,626	12,999	10,579
Automotive service
Segment revenue information
Rental revenue	4,025	3,900	12,427	11,561
Automotive tire services
Segment revenue information
Rental revenue	6,973	6,866	21,111	20,106
Beverages
Segment revenue information
Rental revenue	6,321	6,246	18,827	18,603
Child care
Segment revenue information
Rental revenue	4,990	5,095	14,974	15,613
Convenience stores
Segment revenue information
Rental revenue	22,592	21,727	67,221	62,178
Dollar stores
Segment revenue information
Rental revenue	21,810	12,185	62,880	31,959
Drug stores
Segment revenue information
Rental revenue	21,269	17,767	62,673	40,690
Financial services
Segment revenue information
Rental revenue	4,248	3,916	12,572	11,026
Food processing
Segment revenue information
Rental revenue	3,004	2,815	9,014	8,299
Grocery stores
Segment revenue information
Rental revenue	7,163	5,553	19,763	16,365
Health and fitness
Segment revenue information
Rental revenue	15,800	11,843	46,114	33,005
Health care
Segment revenue information
Rental revenue	4,017	3,824	12,022	10,645
Home improvement
Segment revenue information
Rental revenue	4,796	2,899	10,650	8,364
Restaurants-casual dining
Segment revenue information
Rental revenue	9,591	9,755	28,996	28,568
Restaurants-quick service
Segment revenue information
Rental revenue	7,933	8,026	24,530	23,639
Theaters
Segment revenue information
Rental revenue	11,899	11,538	34,975	34,584
Transportation services
Segment revenue information
Rental revenue	11,598	10,427	34,383	29,505
Wholesale clubs
Segment revenue information
Rental revenue	9,250	8,655	27,247	20,696
Other non-reportable segments
Segment revenue information
Rental revenue	$ 44,631	$ 38,669	$ 129,444	$ 107,234