Segment Information (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012 item	Dec. 31, 2011
Segment Information
Number of industry and activity segments	39
Reconciliation of assets from segment to consolidated
Net real estate	$ 4,304,181	$ 4,160,008
Goodwill	17,094	17,206
Other corporate assets	107,385	88,839
Total assets	4,576,559	4,419,389
Automotive service
Reconciliation of assets from segment to consolidated
Net real estate	99,803	101,175
Goodwill	472	472
Automotive tire services
Reconciliation of assets from segment to consolidated
Net real estate	188,267	191,387
Intangible assets	500	529
Goodwill	866	866
Beverages
Reconciliation of assets from segment to consolidated
Net real estate	312,694	314,832
Intangible assets	3,442	3,571
Child care
Reconciliation of assets from segment to consolidated
Net real estate	64,151	66,474
Goodwill	5,312	5,353
Convenience stores
Reconciliation of assets from segment to consolidated
Net real estate	679,895	690,246
Goodwill	2,069	2,073
Drug stores
Reconciliation of assets from segment to consolidated
Net real estate	159,015	154,015
Intangible assets	15,290	14,422
General merchandise
Reconciliation of assets from segment to consolidated
Net real estate	199,647	17,690
Grocery stores
Reconciliation of assets from segment to consolidated
Net real estate	218,857	221,678
Intangible assets	5,467	5,655
Health and fitness
Reconciliation of assets from segment to consolidated
Net real estate	292,475	293,624
Intangible assets	1,495	1,566
Restaurants - casual dining
Reconciliation of assets from segment to consolidated
Net real estate	463,378	471,842
Goodwill	2,450	2,461
Restaurants- quick service
Reconciliation of assets from segment to consolidated
Net real estate	268,347	277,648
Intangible assets	3,750	4,037
Goodwill	1,262	1,318
Theaters
Reconciliation of assets from segment to consolidated
Net real estate	377,101	383,452
Intangible assets	28,812	31,162
Transportation services
Reconciliation of assets from segment to consolidated
Net real estate	116,684	107,632
Intangible assets	28,624	28,944
Wholesale club
Reconciliation of assets from segment to consolidated
Net real estate	152,934	154,964
Other non-reportable segments
Reconciliation of assets from segment to consolidated
Net real estate	710,933	713,349
Intangible assets	60,519	63,450
Goodwill	$ 4,663	$ 4,663
Number of non-reportable segments	25	25

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

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-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.

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