Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment revenue information
Rental revenue	$ 473,741	$ 408,640	$ 332,780
Other revenue	1,769	1,612	657
Total Revenue	475,510	410,252	333,437
Automotive service
Segment revenue information
Rental revenue	14,961	15,168	15,308
Automotive tire services
Segment revenue information
Rental revenue	22,604	22,595	22,345
Beverages
Segment revenue information
Rental revenue	24,553	23,458	10,292
Child care
Segment revenue information
Rental revenue	21,342	21,508	21,487
Convenience stores
Segment revenue information
Rental revenue	77,905	77,481	58,514
Dollar stores
Segment revenue information
Rental revenue	10,324	143	143
Drug stores
Segment revenue information
Rental revenue	16,594	15,809	13,962
Food processing
Segment revenue information
Rental revenue	6,213	2,953
Grocery stores
Segment revenue information
Rental revenue	17,836	7,149	3,204
Health and fitness
Segment revenue information
Rental revenue	32,782	26,769	23,730
Restaurants - casual dining
Segment revenue information
Rental revenue	34,510	44,632	44,649
Restaurants- quick service
Segment revenue information
Rental revenue	28,109	24,671	23,565
Sporting goods
Segment revenue information
Rental revenue	11,798	11,176	9,144
Theaters
Segment revenue information
Rental revenue	45,073	36,812	30,634
Transportation services
Segment revenue information
Rental revenue	11,516	7,586	750
Wholesale clubs
Segment revenue information
Rental revenue	15,217	3,059
Other non-reportable segments
Segment revenue information
Rental revenue	$ 82,404	$ 67,671	$ 55,053