Segment Information (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2014 segment	Dec. 31, 2013
Segment Information
Number of activity segments	48
Reconciliation of assets from segment to consolidated
Net real estate	$ 9,701,841	$ 8,796,609
Goodwill	15,535	15,660
Other corporate assets	162,585	176,713
Total assets	10,939,840	9,924,441
Apparel
Reconciliation of assets from segment to consolidated
Net real estate	185,946	114,126
Intangible assets	54,371	37,553
Automotive service
Reconciliation of assets from segment to consolidated
Net real estate	112,522	116,190
Intangible assets	2,994	3,248
Goodwill	451	454
Automotive tire services
Reconciliation of assets from segment to consolidated
Net real estate	256,741	258,403
Intangible assets	15,288	15,770
Goodwill	865	865
Beverages
Reconciliation of assets from segment to consolidated
Net real estate	303,070	306,278
Intangible assets	2,861	3,055
Child care
Reconciliation of assets from segment to consolidated
Net real estate	55,190	56,599
Goodwill	5,127	5,141
Convenience stores
Reconciliation of assets from segment to consolidated
Net real estate	761,463	766,472
Intangible assets	17,909	13,342
Goodwill	2,030	2,031
Dollar stores
Reconciliation of assets from segment to consolidated
Net real estate	1,171,645	824,274
Intangible assets	59,875	50,209
Drug stores
Reconciliation of assets from segment to consolidated
Net real estate	1,029,922	943,401
Intangible assets	194,160	180,506
Financial services
Reconciliation of assets from segment to consolidated
Net real estate	264,045	252,987
Intangible assets	40,799	40,112
Food processing
Reconciliation of assets from segment to consolidated
Net real estate	134,436	138,000
Intangible assets	23,516	25,297
Grocery stores
Reconciliation of assets from segment to consolidated
Net real estate	333,903	280,047
Intangible assets	42,887	22,073
Health and fitness
Reconciliation of assets from segment to consolidated
Net real estate	556,846	493,981
Intangible assets	69,275	53,703
Health care
Reconciliation of assets from segment to consolidated
Net real estate	228,374	228,491
Intangible assets	36,284	38,465
Home improvement
Reconciliation of assets from segment to consolidated
Net real estate	213,226	121,575
Intangible assets	39,262	18,039
Restaurants-casual dining
Reconciliation of assets from segment to consolidated
Net real estate	459,391	475,480
Intangible assets	10,963	11,906
Goodwill	2,299	2,328
Restaurants-quick service
Reconciliation of assets from segment to consolidated
Net real estate	297,659	312,474
Intangible assets	16,905	17,936
Goodwill	1,086	1,131
Theaters
Reconciliation of assets from segment to consolidated
Net real estate	379,498	367,830
Intangible assets	22,794	23,600
Transportation services
Reconciliation of assets from segment to consolidated
Net real estate	661,504	623,541
Intangible assets	104,178	107,296
Wholesale clubs
Reconciliation of assets from segment to consolidated
Net real estate	468,820	455,875
Intangible assets	40,580	33,221
Other non-reportable segments
Reconciliation of assets from segment to consolidated
Net real estate	1,827,640	1,660,585
Intangible assets	264,978	240,128
Goodwill	$ 3,677	$ 3,710
Number of non-reportable segments	29	29

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