XML 93 R83.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stock-Based Compensation Plans and Employee Benefits (Stock-Based Compensation) (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 USD ($) point shares | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) point $ / shares shares | Sep. 30, 2017 USD ($) point shares | Dec. 31, 2017 USD ($) point shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense | $ | $ 3,651 | $ 2,934 | $ 16,245 | $ 12,730 |
Number of Points Outstanding [Roll Forward] |  |  |  |  |
Accrued expenses | $ | $ 92,783 |  | $ 92,783 |  | $ 101,035
Long-term Incentive Plan 2009 |  |  |  |  |
Number of Points Outstanding [Roll Forward] |  |  |  |  |
Shares available for issuance (in shares) | shares | 2,600,000 |  | 2,600,000 |  |
2013-2014 Performance Incentive Plan |  |  |  |  |
Number of Points Outstanding [Roll Forward] |  |  |  |  |
Points at beginning of period |  |  | 86.57 | 92.00 | 92.00
Granted (points) |  |  | 0.50 |  | 5.00
Forfeited (points) |  |  | (1.31) |  | (10.43)
Points at end of period | 85.76 |  | 85.76 |  | 86.57
Preferred return hurdle |  |  |  |  | 9.00%
Decrease in distributable return (percent) |  |  | 4.30% |  |
Compensation value of total distribution | $ |  |  | $ 14,300 |  |
Cash portion of points distribution | $ |  |  | $ 7,200 |  |
Number of shares issued in points distribution (in shares) | shares |  |  | 625,788 |  |
Value of shares issued in points distribution | $ |  |  | $ 7,100 |  |
Fair value of shares in points distribution (in dollars per share) | $ / shares |  |  | $ 11.39 |  |
Number of shares issued, net of tax withholding in points distribution (in shares) | shares |  |  | 343,402 |  |
2015-2016 Performance Plan |  |  |  |  |
Number of Points Outstanding [Roll Forward] |  |  |  |  |
Points at beginning of period |  |  | 84.16 | 74.10 | 74.10
Granted (points) |  |  | 0.00 |  | 17.88
Forfeited (points) |  |  | (4.80) |  | (7.82)
Points at end of period | 79.36 |  | 79.36 |  | 84.16
2017-2018 Performance Incentive Plan |  |  |  |  |
Number of Points Outstanding [Roll Forward] |  |  |  |  |
Points at beginning of period |  |  | 40.97 | 0.00 | 0.00
Granted (points) |  |  | 49.33 |  | 41.68
Forfeited (points) |  |  | (7.88) |  | (0.71)
Points at end of period | 82.42 |  | 82.42 |  | 40.97
All Performance Incentive Plans |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense | $ | $ 2,400 | $ 1,900 | $ 12,600 | $ 9,800 |
Number of Points Outstanding [Roll Forward] |  |  |  |  |
Accrued expenses | $ | $ 36,000 |  | $ 36,000 |  | $ 38,100
Common Stock Subject to Sales Restriction | Employees |  |  |  |  |
Number of Points Outstanding [Roll Forward] |  |  |  |  |
Vested, number of shares (in shares) | shares |  |  | 213,609 |  |
Restricted shares awarded (in shares) | shares |  |  | 135,503 |  |
Sale restriction period |  |  | 18 months |  |
Restricted Stock Units |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |
Non-vested at beginning of period (in shares) | shares |  |  | 282,000 | 290,000 | 290,000
Granted (in shares) | shares |  |  | 278,000 |  | 116,000
Vested (in shares) | shares |  |  | (45,000) |  | (75,000)
Forfeited (in shares) | shares |  |  | (61,000) |  | (49,000)
Non-vested at end of period (in shares) | shares | 454,000 |  | 454,000 |  | 282,000
Unrecognized compensation cost | $ | $ 2,400 |  | $ 2,400 |  |
Weighted-average period to recognize the unrecognized compensation cost |  |  | 1 year 9 months 21 days |  |

X
- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include property accounts payable, legal liabilities, loan costs, general and administrative liabilities, but exclude interest. + References No definition available. + Details
Name: | star_AccruedLiabilitiesOtherThanInterest
Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of Points Forfeited + References No definition available. + Details
Name: | star_NumberofPointsForfeited
Namespace Prefix: | star_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Points Granted + References No definition available. + Details
Name: | star_NumberofPointsGranted
Namespace Prefix: | star_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Points Outstanding + References No definition available. + Details
Name: | star_NumberofPointsOutstanding
Namespace Prefix: | star_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Points Outstanding [Roll Forward] + References No definition available. + Details
Name: | star_NumberofPointsOutstandingRollForward
Namespace Prefix: | star_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Points Distribution During Period, Shares, Fair Value of Shares Issued + References No definition available. + Details
Name: | star_PointsDistributionDuringPeriodSharesFairValueofSharesIssued
Namespace Prefix: | star_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Points Distribution During Period, Shares, Number of Shares + References No definition available. + Details
Name: | star_PointsDistributionDuringPeriodSharesNumberofShares
Namespace Prefix: | star_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Points Distribution During Period, Shares, Number of Shares Issued Net of Tax Withholding + References No definition available. + Details
Name: | star_PointsDistributionDuringPeriodSharesNumberofSharesIssuedNetofTaxWithholding
Namespace Prefix: | star_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Points Distribution During Period, Value + References No definition available. + Details
Name: | star_PointsDistributionDuringPeriodValue
Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Points Distribution During Period, Value, Cash + References No definition available. + Details
Name: | star_PointsDistributionDuringPeriodValueCash
Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Points Distribution During Period, Value, Shares + References No definition available. + Details
Name: | star_PointsDistributionDuringPeriodValueShares
Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Preferred Return, Increase (Decrease) In Distribution, Percent + References No definition available. + Details
Name: | star_PreferredReturnIncreaseDecreaseInDistributionPercent
Namespace Prefix: | star_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition preferred return + References No definition available. + Details
Name: | star_Preferredreturn
Namespace Prefix: | star_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Sale Restriction Period + References No definition available. + Details
Name: | star_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsSaleRestrictionPeriod
Namespace Prefix: | star_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of restricted shares issued as compensation, net of shares for the payment of withholding taxes. This element is to be used only if shares are used in lieu of cash to satisfy all or a portion of withholding taxes. + References No definition available. + Details
Name: | us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of share instruments newly issued under a share-based compensation plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=star_LongTermIncentivePlan2009Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=star_A20132014PerformanceIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=star_A20152016PerformancePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=star_A20172018PerformanceIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=star_AllperformanceincentiveplansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=star_CommonStockSubjecttoSalesRestrictionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | star_ScheduleOfShareBasedCompensationArrangementByTitleOfIndividualAxis=star_EmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |