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Debt Obligations, net (Secured Credit Facility Narrative) (Details) (USD $) | 12 Months Ended | 1 Months Ended | 18 Months Ended | 1 Months Ended | 33 Months Ended | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2014 | Feb. 28, 2013 | Jun. 10, 2014 | Mar. 31, 2012 tranches | Dec. 31, 2014 | Nov. 30, 2013 | May 31, 2013 | Feb. 11, 2013 | Oct. 15, 2012 | Nov. 13, 2013
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of principal amount | $ 1,471,174,000us-gaap_RepaymentsOfDebt |  | $ 1,984,102,000us-gaap_RepaymentsOfDebt | $ 4,608,133,000us-gaap_RepaymentsOfDebt |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt, net | 25,369,000us-gaap_GainsLossesOnExtinguishmentOfDebt |  | 33,190,000us-gaap_GainsLossesOnExtinguishmentOfDebt | 37,816,000us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |  |  |  |  |  |  |  |  |
February 2013 Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  | 1,710,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |
Debt instrument, lender fees, amount |  |  |  |  |  | 17,100,000star_DebtInstrumentLenderFeesAmount / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |  |  |  |  |  |  |  |
Debt instrument, capitalized lender fees |  |  |  |  |  | 14,400,000star_DebtInstrumentCapitalizedLenderFees / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |  |  |  |  |  |  |  |
Debt instrument, lender fees, amount recorded as a loss on early extinguishment of debt |  |  |  |  |  | 2,700,000star_DebtInstrumentLenderFeesAmountRecordedasaLossonEarlyExtinguishmentofDebt / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |  |  |  |  |  |  |  |
Debt instrument, third party fees |  |  |  |  |  | 3,800,000star_DebtInstrumentThirdPartyFees / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |  |  |  |  |  |  |  |
Debt instrument, third party fees, amount recognized |  |  |  |  |  | 3,600,000star_DebtInstrumentThirdPartyFeesAmountRecognized / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |  |  |  |  |  |  |  |
Debt instrument, third party fees, amount capitalized |  |  |  |  |  | 200,000star_DebtInstrumentThirdPartyFeesAmountCapitalized / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |  |  |  |  |  |  |  |
Repayment of principal amount |  |  |  |  | 1,320,000,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  | 388,500,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember |  |  |  |  |  |  |  |
Variable interest rate, basis | LIBOR | [1] |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate, spread | 3.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember | [1] |  |  |  |  |  |  |  |  |  |  |  |  |
October 2012 Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,820,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_NewCreditFacilityDueOctober2017Member |
2012 Tranche A-1 Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | 410,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA1FacilityDueMarch2016Member |  |  |  |  |  |  |
Loss on early extinguishment of debt, net |  |  | 4,400,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA1FacilityDueMarch2016Member | 8,100,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA1FacilityDueMarch2016Member |  |  |  |  |  |  |  |  |  |  |
Variable interest rate, basis | LIBOR |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of par credit facilities were issued at |  |  |  |  |  |  |  | 98.00%star_LineOfCreditFacilityIssuePriceAsPercentageOfPrincipalAmount / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA1FacilityDueMarch2016Member |  |  |  |  |  |  |
Variable interest rate, spread | 4.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA1FacilityDueMarch2016Member |  |  |  |  |  |  |  |  |  |  |  |  |  |
2012 Secured Credit Facilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | 880,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilities2012Member |  |  |  |  |  |  |
Number of tranches |  |  |  |  |  |  |  | 2star_NumberOfTranchesUnderTermLoans / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilities2012Member |  |  |  |  |  |  |
Unsecured Notes LIBOR plus 0.50% senior convertible notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of principal amount |  |  |  |  |  |  |  | 606,700,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesLiborPlusPoint50PercentSeniorConvertibleNotesDueOctober2012Member |  |  |  |  |  |  |
Unsecured Line of credit due June 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of principal amount |  |  |  |  |  |  |  | 244,000,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredCreditFacilityLineOfCreditJune2012Member |  |  |  |  |  |  |
Unsecured Notes 5.50% senior notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  | 5.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point50PercentSeniorNotesDueJune2012Member |  |  |  |  |  |  |
Repayment of principal amount |  |  |  |  |  |  |  | 90,300,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point50PercentSeniorNotesDueJune2012Member |  |  |  |  |  |  |
2012 Tranche A-2 Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  | 470,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member |  |  |  |  |  |  |
Stated interest rate | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member |  |  |  |  |  |  |  | 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member |  |  |  |  |  |
Repayment of principal amount |  |  |  |  |  |  |  |  | 111,500,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member |  |  |  |  |  |
Loss on early extinguishment of debt, net | 1,500,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member |  | 1,000,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate, basis | LIBOR | [2] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of par credit facilities were issued at |  |  |  |  |  |  |  | 98.50%star_LineOfCreditFacilityIssuePriceAsPercentageOfPrincipalAmount / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member |  |  |  |  |  |  |
Variable interest rate, spread | 5.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member | [2] |  |  |  |  |  |  |  |  |  |  |  |  |
Unsecured Notes 4.00% Senior Notes Due November 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | 550,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFourPercentSeniorNotesDueNovember2017Member |  |  |  |  |  |  |  |
Stated interest rate | 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFourPercentSeniorNotesDueNovember2017Member |  |  |  |  |  | 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFourPercentSeniorNotesDueNovember2017Member |  | 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFourPercentSeniorNotesDueNovember2017Member |  |  |  |  |  |
Unsecured Notes 5.00% Senior Notes Due July 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  | 770,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFivePercentSeniorNotesDueJuly2019Member |  |  |  |  |  |  |  |
Stated interest rate | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFivePercentSeniorNotesDueJuly2019Member |  |  |  |  |  | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFivePercentSeniorNotesDueJuly2019Member |  | 5.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotesFivePercentSeniorNotesDueJuly2019Member |  |  |  |  |  |
Senior Convertible One Point 50 Percent Notes Due November 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_SeniorConvertibleOnePoint50PercentNotesDueNovember2016Member
Stated interest rate | 1.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_SeniorConvertibleOnePoint50PercentNotesDueNovember2016Member | [3] |  |  |  |  |  |  | 1.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_SeniorConvertibleOnePoint50PercentNotesDueNovember2016Member | [3] |  |  |  |  | 1.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_SeniorConvertibleOnePoint50PercentNotesDueNovember2016Member
Unsecured Notes 5 Point 70 Percent Senior Notes Due March 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.70%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point70PercentSeniorNotesDueMarch2014Member
Repayment of principal amount |  |  |  |  |  |  |  |  |  |  | 200,600,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point70PercentSeniorNotesDueMarch2014Member |  |  |  |
Loss on early extinguishment of debt, net |  |  | 2,800,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point70PercentSeniorNotesDueMarch2014Member |  |  |  |  |  |  |  |  |  |  |  |
Unsecured Notes 3 point 875 Percent Senior Notes Due July 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | 265,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes3point875PercentSeniorNotesDueJuly2016Member |  |  |
Stated interest rate | 3.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes3point875PercentSeniorNotesDueJuly2016Member |  |  |  |  |  |  |  | 3.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes3point875PercentSeniorNotesDueJuly2016Member |  |  | 3.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes3point875PercentSeniorNotesDueJuly2016Member |  |  |
Unsecured Notes 4 point 875 Percent Senior Notes Due July 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | 300,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes4point875PercentSeniorNotesDueJuly2018Member |  |  |
Stated interest rate | 4.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes4point875PercentSeniorNotesDueJuly2018Member |  |  |  |  |  |  |  | 4.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes4point875PercentSeniorNotesDueJuly2018Member |  |  | 4.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes4point875PercentSeniorNotesDueJuly2018Member |  |  |
Unsecured Notes 8 point 625 Percent Senior Notes Due June 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  |  |  | 8.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes8Point625PercentSeniorNotesDueJune2013Member |  |  |
Repayment of principal amount |  |  |  |  |  |  |  |  |  |  |  | 96,800,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes8Point625PercentSeniorNotesDueJune2013Member |  |  |
Unsecured Notes 5 point 95 Percent Senior Notes Due October 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  |  |  |  |  |  |  |  | 5.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point95PercentSeniorNotesDueOctober2013Member |  |  |
Repayment of principal amount |  |  |  |  |  |  |  |  |  |  |  | 448,500,000us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point95PercentSeniorNotesDueOctober2013Member |  |  |
Loss on early extinguishment of debt, net |  |  | 9,500,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_UnsecuredNotes5Point95PercentSeniorNotesDueOctober2013Member |  |  |  |  |  |  |  |  |  |  |  |
Minimum | 2012 Tranche A-2 Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate, spread | 1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA2FacilityDueMarch2017Member / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) | Minimum | February 2013 Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate, spread | 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) | Minimum | 2012 Tranche A-1 Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Variable interest rate, spread | 1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = star_SecuredCreditFacilitiesTrancheA1FacilityDueMarch2016Member / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
Normal Repayment [Member] | February 2013 Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on early extinguishment of debt, net | 1,100,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember / star_RepaymentTypeAxis = star_NormalRepaymentMember |  | 7,000,000us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember / star_RepaymentTypeAxis = star_NormalRepaymentMember |  |  |  |  |  |  |  |  |  |  |  |
Early Repayment [Member] | February 2013 Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, lender fees, amount recorded as a loss on early extinguishment of debt | $ 22,800,000star_DebtInstrumentLenderFeesAmountRecordedasaLossonEarlyExtinguishmentofDebt / us-gaap_LongtermDebtTypeAxis = star_February2013SecuredCreditFacilityMember / star_RepaymentTypeAxis = star_EarlyRepaymentMember |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | This loan had a LIBOR floor of 1.00%.
[2] | The loan has a LIBOR floor of 1.25%. As of December 31, 2014, inclusive of the floor, the 2012 Tranche A-2 Facility loan incurred interest at a rate of 7.00%.
[3] | The Company's 1.50% senior convertible fixed rate notes due November 2016 ("1.50% Convertible Notes") are convertible at the option of the holders, into 57.8 shares per $1,000 principal amount of 1.50% Convertible Notes, at any time prior to the close of business on November 14, 2016.

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- Definition Debt Instrument, Lender Fees, Amount + References No definition available. + Details
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- Definition Debt Instrument, Lender Fees, Amount Recorded as a Loss on Early Extinguishment of Debt + References No definition available. + Details
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Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
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- Definition Debt Instrument, Third Party Fees + References No definition available. + Details
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Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Debt Instrument, Third Party Fees, Amount Capitalized + References No definition available. + Details
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Namespace Prefix: | star_
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- Definition Debt Instrument, Third Party Fees, Amount Recognized + References No definition available. + Details
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Namespace Prefix: | star_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the percentage of principal amount used in the computation of issue price for the line of credit facility. + References No definition available. + Details
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Namespace Prefix: | star_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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Namespace Prefix: | star_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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