XML 179 R82.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Equity (Dividends) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Dividends [Abstract] |  |
Minimum percentage of taxable income (excluding net capital gains) to be distributed in order to qualify as REIT | 90.00% |
Percentage of taxable income (including net capital gains) to be distributed in order to qualify as REIT | 100.00% |
Operating loss carryforwards |  | $ 948.8

X
- Definition Represents the minimum percentage of taxable income (excluding capital gains) to be distributed in order to qualify as REIT. + References No definition available. + Details
Name: | star_MinimumPercentageOfTaxableIncomeExcludingCapitalGainsToBeDistributedToQualifyAsReit
Namespace Prefix: | star_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of taxable income (including capital gains) to be distributed in order to qualify as REIT. + References No definition available. + Details
Name: | star_PercentageOfTaxableIncomeIncludingCapitalGainsToBeDistributedToQualifyAsReit
Namespace Prefix: | star_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DividendsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant