XML 44 R43.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Real Estate (Acquisitions) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Real Estate Properties [Line Items] |  |
Acquisitions of real estate assets | $ 0 us-gaap_PaymentsToAcquireRealEstate | $ 2,412 us-gaap_PaymentsToAcquireRealEstate
Condominium Units |  |
Real Estate Properties [Line Items] |  |
Acquisitions of real estate assets |  | $ 2,400 us-gaap_PaymentsToAcquireRealEstate / us-gaap_RealEstatePropertiesAxis = star_CondominiumUnitsMember
Number of properties acquired |  | 1 star_NumberofPropertiesAcquired / us-gaap_RealEstatePropertiesAxis = star_CondominiumUnitsMember

X
- Definition Number of Properties Acquired + References No definition available. + Details
Name: | star_NumberofPropertiesAcquired
Namespace Prefix: | star_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RealEstatePropertiesAxis=star_CondominiumUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |