Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment revenue information
Rental revenue	$ 115,038	$ 101,361	$ 229,060	$ 197,934
Other revenue	605	259	858	398
Total Revenue	115,643	101,620	229,918	198,332
Automotive service
Segment revenue information
Rental revenue	3,744	3,859	7,558	7,855
Automotive tire services
Segment revenue information
Rental revenue	5,656	6,595	11,290	12,224
Beverages
Segment revenue information
Rental revenue	6,105	5,843	12,210	11,512
Child care
Segment revenue information
Rental revenue	5,365	5,434	10,781	11,003
Convenience stores
Segment revenue information
Rental revenue	19,368	19,262	38,664	38,490
Drug stores
Segment revenue information
Rental revenue	4,092	4,035	8,124	7,759
General merchandise
Segment revenue information
Rental revenue	1,765	679	2,434	1,329
Grocery stores
Segment revenue information
Rental revenue	4,387	1,634	8,779	3,268
Health and fitness
Segment revenue information
Rental revenue	7,955	6,242	15,932	12,474
Restaurants - casual dining
Segment revenue information
Rental revenue	8,648	11,329	17,522	22,714
Restaurants- quick service
Segment revenue information
Rental revenue	7,045	5,976	14,386	12,391
Theaters
Segment revenue information
Rental revenue	11,127	7,980	22,259	15,936
Transportation services
Segment revenue information
Rental revenue	2,918	2,157	5,627	2,848
Wholesale club
Segment revenue information
Rental revenue	3,025		6,051
Other non-reportable segments
Segment revenue information
Rental revenue	$ 23,838	$ 20,336	$ 47,443	$ 38,131