Segment Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012 segment	Dec. 31, 2011
Segment Information
Number of activity segments	45
Reconciliation of assets from segment to consolidated
Net real estate	$ 5,042,137	$ 4,160,008
Goodwill	16,945	17,206
Other corporate assets	142,156	88,839
Total assets	5,443,363	4,419,389
Automotive service
Reconciliation of assets from segment to consolidated
Net real estate	96,830	99,974
Goodwill	471	472
Automotive tire services
Reconciliation of assets from segment to consolidated
Net real estate	184,601	191,797
Intangible assets	470	529
Beverages
Reconciliation of assets from segment to consolidated
Net real estate	310,555	314,832
Intangible assets	3,313	3,571
Child care
Reconciliation of assets from segment to consolidated
Net real estate	61,747	66,213
Goodwill	5,276	5,353
Convenience stores
Reconciliation of assets from segment to consolidated
Net real estate	670,103	690,246
Goodwill	2,064	2,073
Drug stores
Reconciliation of assets from segment to consolidated
Net real estate	159,482	154,015
Intangible assets	14,885	14,422
Grocery stores
Reconciliation of assets from segment to consolidated
Net real estate	219,216	224,893
Intangible assets	5,650	6,096
Health and fitness
Reconciliation of assets from segment to consolidated
Net real estate	330,503	293,624
Intangible assets	15,056	1,566
Restaurants - casual dining
Reconciliation of assets from segment to consolidated
Net real estate	450,182	469,025
Goodwill	2,430	2,461
Restaurants- quick service
Reconciliation of assets from segment to consolidated
Net real estate	251,084	277,648
Intangible assets	3,464	4,037
Goodwill	1,176	1,318
Theaters
Reconciliation of assets from segment to consolidated
Net real estate	381,123	383,452
Intangible assets	28,475	31,162
Transportation services
Reconciliation of assets from segment to consolidated
Net real estate	130,203	107,632
Intangible assets	27,997	28,944
Wholesale clubs
Reconciliation of assets from segment to consolidated
Net real estate	308,202	154,964
Other non-reportable segments
Reconciliation of assets from segment to consolidated
Net real estate	857,039	597,666
Intangible assets	103,693	41,786
Goodwill	$ 4,663	$ 4,663
Number of non-reportable segments	29	29

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References+ Details

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph l

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details