Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment revenue information
Rental revenue	$ 221,868	$ 180,089	$ 435,989	$ 347,887
Tenant reimbursements	6,169	4,485	12,597	10,512
Other revenue	609	1,869	1,632	3,566
Total revenue	228,646	186,443	450,218	361,965
Apparel
Segment revenue information
Rental revenue	4,276	3,501	8,077	6,952
Automotive service
Segment revenue information
Rental revenue	4,261	3,867	8,117	7,661
Automotive tire services
Segment revenue information
Rental revenue	7,086	6,752	14,138	13,240
Beverages
Segment revenue information
Rental revenue	6,253	6,179	12,506	12,357
Child care
Segment revenue information
Rental revenue	4,996	5,343	9,984	10,518
Convenience stores
Segment revenue information
Rental revenue	22,525	20,505	44,629	40,451
Dollar stores
Segment revenue information
Rental revenue	21,611	10,184	41,070	19,774
Drug stores
Segment revenue information
Rental revenue	21,141	12,661	41,405	22,923
Financial services
Segment revenue information
Rental revenue	4,201	3,915	8,302	7,059
Food processing
Segment revenue information
Rental revenue	3,005	2,815	6,010	5,484
Grocery stores
Segment revenue information
Rental revenue	6,710	5,527	12,600	10,812
Health and fitness
Segment revenue information
Rental revenue	15,466	10,859	30,314	21,162
Health care
Segment revenue information
Rental revenue	4,018	3,839	8,005	6,821
Restaurants-casual dining
Segment revenue information
Rental revenue	9,649	9,615	19,405	18,813
Restaurants-quick service
Segment revenue information
Rental revenue	7,868	7,672	16,597	15,613
Theaters
Segment revenue information
Rental revenue	11,548	11,538	23,077	23,046
Transportation services
Segment revenue information
Rental revenue	11,503	10,447	22,786	19,078
Wholesale clubs
Segment revenue information
Rental revenue	9,245	6,085	17,997	12,041
Other non-reportable segments
Segment revenue information
Rental revenue	$ 46,506	$ 38,785	$ 90,970	$ 74,082