XML 58 R100.htm IDEA: XBRL DOCUMENT v2.4.1.9

Stock-Based Compensation Plans and Employee Benefits (401(k) Plan) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Defined contribution plan, service requirement	3 months
Gross contributions made by the Company	$ 0.9us-gaap_DefinedContributionPlanCostRecognized	$ 0.9us-gaap_DefinedContributionPlanCostRecognized	$ 0.9us-gaap_DefinedContributionPlanCostRecognized
Defined contribution plan maximum percentage Of matching contribution	50.00%star_DefinedContributionPlanMaximumPercentageOfMatchingContributionCompanyMayMakeOfFirstTenPercentageOfParticipatingEmployeesAnnualCompensationAtDiscretionOfBoardOfDirectors
Defined contribution plan maximum percentage Of employee compensation	10.00%star_DefinedContributionPlanMaximumPercentageOfEmployeeCompensationUponWhichCompanyMatchingContributionIsBased

X

- Definition

Represents the maximum percentage of a participant's annual compensation upon which the matching Company contribution is based.

+ References

No definition available.

+ Details

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Namespace Prefix:	star_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

At the discretion of the Board of Directors, represents the maximum percentage matching contribution which the Company may make of the first ten percent of the participant's annual compensation.

+ References

No definition available.

+ Details

Name:	star_DefinedContributionPlanMaximumPercentageOfMatchingContributionCompanyMayMakeOfFirstTenPercentageOfParticipatingEmployeesAnnualCompensationAtDiscretionOfBoardOfDirectors
Namespace Prefix:	star_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the period of continuous service with the Company required in order to be eligible to participate in the 401(k) Plan.

+ References

No definition available.

+ Details

Name:	star_DefinedContributionPlanServiceRequirement
Namespace Prefix:	star_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

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

X

- Details

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