Represents the increase or decrease on the annual rent that the entity is obligated to pay on an operating lease.

No definition available.

Name:	fve_IncreaseDecreaseOperatingLeasesAnnualRent
Namespace Prefix:	fve_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the number of real estate properties combined as and when mortgage financings are paid by the entity as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	fve_NumberOfLeasedCombinedIntoAsAndWhenMortgageFinancingPaid
Namespace Prefix:	fve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of leases.

+ References

No definition available.

+ Details

Name:	fve_NumberOfLeases
Namespace Prefix:	fve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of leases, which exit to accommodate mortgage financing by the entity as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	fve_NumberOfLeasesWhichExitToAccommodateMortgageFinancing
Namespace Prefix:	fve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of real estate properties classified as discontinued operations by the entity as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	fve_NumberOfRealEstatePropertiesClassifiedAsDiscontinuedOperations
Namespace Prefix:	fve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of real estate properties under operating lease arrangements leased by the entity as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	fve_NumberOfRealEstatePropertiesLeased
Namespace Prefix:	fve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of properties under percentage rent.

+ References

No definition available.

+ Details

Name:	fve_NumberOfRealEstatePropertiesLeasedUnderPercentageRent
Namespace Prefix:	fve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of renewal options.

+ References

No definition available.

+ Details

Name:	fve_NumberOfRenewalOptions
Namespace Prefix:	fve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the lease renewal term.

+ References

No definition available.

+ Details

Name:	fve_OperatingLeasesRenewalTerm
Namespace Prefix:	fve_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the rental expense during the period based on revenues generated operations, generally in excess of a base amount. Such rent is generally stipulated in the lease agreement, usually will provide for a fixed percentage of revenue to be paid as additional (or possibly only) rent, and may be based on gross revenues, net revenues, or multiple variations thereof. Percentage rent is often required under leases with retail outlets located on premises owned by hoteliers, cruise lines, others in the hospitality industry, and shopping mall operators, among others.

+ References

No definition available.

+ Details

Name:	fve_PercentageRentExpense
Namespace Prefix:	fve_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the percentage of amount of gross revenue in excess of gross revenues in a base year as defined in the lease.

+ References

No definition available.

+ Details

Name:	fve_PercentageRentOfAmountOfGrossRevenueInExcessOfBaseYearGrossRevenue
Namespace Prefix:	fve_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the amount of improvements to real estate properties made by lessees and purchased by the Lessor.

+ References

No definition available.

+ Details

Name:	fve_RealEstateImprovementsByLesseeFundedByLessor
Namespace Prefix:	fve_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_OperatingLeasedAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the payments that the lessee is obligated to make or can be required to make in connection with a property under the terms of an agreement classified as an operating lease, excluding contingent rentals and a guarantee by the lessee of the lessor's debt and the lessee's obligation to pay (apart from the rental payments) executory costs such as insurance, maintenance, and taxes.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 25

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=7661868&loc=d3e34039-112682

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseMinimumRentals
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 property	Dec. 31, 2012	Dec. 31, 2011
Leases
Number of properties leased and operated	191
Annual minimum rent	$ 192,635
Lease No. 1 \| Two 15-year renewal options
Leases
Number of properties leased and operated	90
Annual minimum rent	58,726
Number of renewal options	2
Renewal term	15 years
Lease No. 2 \| Two 10-year renewal options
Leases
Number of properties leased and operated	51
Annual minimum rent	62,461
Number of renewal options	2
Renewal term	10 years
Lease No. 3 \| Two 15-year renewal options
Leases
Number of properties leased and operated	17
Annual minimum rent	34,205
Number of renewal options	2
Renewal term	15 years
Lease No. 4 \| Two 15-year renewal options
Leases
Number of properties leased and operated	29
Annual minimum rent	34,743
Number of renewal options	2
Renewal term	15 years
One HCP lease \| One 10-year renewal options
Leases
Number of properties leased and operated	4
Annual minimum rent	2,500
Number of renewal options	1
Renewal term	10 years
SNH
Leases
Amount funded for leasehold improvements	27,208	30,520	33,269
Increase (decrease) in annual lease rent payable	2,177	2,456	2,665
Number of real estate properties classified as discontinued operations	4
Senior Living Communities
Leases
Number of properties leased and operated	181
Senior Living Communities \| Lease No. 1
Leases
Number of leases	3
Number of property leases, which exist to accommodate mortgage financing	2
Number of leases combined into as and when mortgage financings are paid	1
Senior Living Communities \| Lease No. 4
Leases
Number of leases	2
Number of property leases, which exist to accommodate mortgage financing	1
Number of leases combined into as and when mortgage financings are paid	1
Senior Living Communities \| HCP
Leases
Number of properties leased and operated	4
Senior Living Communities \| SNH
Leases
Number of properties under percentage rent	180
Percentage of gross revenue	4.00%
Percentage rent	$ 5,149	$ 4,888	$ 4,879
Number of properties leased and operated	187
Number of real estate properties classified as discontinued operations	10
Number of leases	4