Joint Venture (Details) (USD $)	Oct. 01, 2012 properties	Sep. 30, 2012 properties	Sep. 29, 2012 properties
Investment [Line Items]
Number of Real Estate Properties		109
Bickford Senior Living [Member]
Investment [Line Items]
Number of Real Estate Properties	10		8
Joint Venture Operating Company Ownership Interest Received		85.00%
Number of Real Estate Properties To Be Constructed		8
Construction Commitment Period in Years		3
Number Of Development Projects Active		2
Maximum Commitment For All Active Development Projects		$ 18,000,000
Development in Process		1,971,000
Number of years in initial lease term		5
Lease Escalator Rate		3.00%
Joint Venture Contributed Properties Ownership Interest Retained		85.00%
Significant Acquisition Voting Rights Acquired		50.00%
Acquisition Bickford Senior Living [Member]
Investment [Line Items]
Number of Real Estate Properties		2
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds		52,667,000
Significant Acquisition, Cost, Cash		22,453,000
Significant Acquisition, Cost, Debt Assumed		19,250,000
Joint Venture Contributed Properties Ownership Interest Surrendered		15.00%
Joint Venture Contributed Properties Ownership Interest Surrendered Estimated Fair Value		10,964,000
Cash Paid In Settlement Of Contingent Purchase Consideration Liability		2,922,000
Noncontrolling Interest in Joint Ventures		8,309,000
Gain Recognized On Settlement Of Contingent Purchase Consideration Liability		78,000
Real Estate Investments, Joint Ventures		41,436,000
Number of Units in Real Estate Property		170
Land [Member] | Acquisition Bickford Senior Living [Member]
Investment [Line Items]
Real Estate Investments, Joint Ventures		4,100,000
Building and Building Improvements [Member] | Acquisition Bickford Senior Living [Member]
Investment [Line Items]
Real Estate Investments, Joint Ventures		$ 37,336,000