Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment revenue information
Rental revenue	$ 119,845	$ 105,742	$ 348,682	$ 302,600
Other revenue	392	488	1,250	886
Total Revenue	120,237	106,230	349,932	303,486
Automotive service
Segment revenue information
Rental revenue	3,701	3,817	11,196	11,609
Automotive tire services
Segment revenue information
Rental revenue	5,641	5,644	16,962	16,974
Beverages
Segment revenue information
Rental revenue	6,171	5,960	18,381	17,472
Child care
Segment revenue information
Rental revenue	5,373	5,470	16,099	16,433
Convenience stores
Segment revenue information
Rental revenue	19,521	19,430	58,376	58,109
Dollar stores
Segment revenue information
Rental revenue	3,618	36	4,745	107
Drug stores
Segment revenue information
Rental revenue	4,220	4,017	12,344	11,777
Grocery stores
Segment revenue information
Rental revenue	4,387	1,632	13,166	4,899
Health and fitness
Segment revenue information
Rental revenue	8,059	6,470	23,991	18,944
Restaurants - casual dining
Segment revenue information
Rental revenue	8,734	11,473	26,284	34,270
Restaurants- quick service
Segment revenue information
Rental revenue	6,955	6,197	21,000	18,254
Sporting goods
Segment revenue information
Rental revenue	2,936	2,791	8,853	8,295
Theaters
Segment revenue information
Rental revenue	11,364	9,779	33,622	25,715
Transportation services
Segment revenue information
Rental revenue	2,942	2,298	8,569	5,146
Wholesale club
Segment revenue information
Rental revenue	3,359	34	9,410	34
Other non-reportable segments
Segment revenue information
Rental revenue	$ 22,864	$ 20,694	$ 65,684	$ 54,562