XML 50 R41.htm IDEA: XBRL DOCUMENT
v3.20.2

Stock-Based Compensation Plans and Employee Benefits (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of performance incentive plans | The following is a summary of the status of the Company’s liability-classified iPIP plans and changes during the six months ended June 30, 2020.
| iPIP Investment Pool |  |  |  |  |  |  |  |  |  |  |  |
| 2013-2014 |  | 2015-2016 |  | 2017-2018 |  |  |  |  |  |  |  |
Points at beginning of period | 81.17 |  |  | 73.28 |  |  | 77.27 |  |  |  |  |  |  |  |  |
Forfeited | (1.00) |  |  | (1.13) |  |  | (0.93) |  |  |  |  |  |  |  |  |
Points at end of period | 80.17 |  |  | 72.15 |  |  | 76.34 |  |  |  |  |  |  |  |  |
Schedule of restricted stock units activity | A summary of the Company’s stock-based compensation awards to certain employees in the form of long-term incentive awards for the six months ended June 30, 2020, is as follows (in thousands):
Nonvested at beginning of period | 598 |  |  |
Granted | 181 |  |  |
Vested | (109) |  |  |
Nonvested at end of period | 670 |  |  |

X
- Definition Schedule Of Share-Based Compensation, Performance Incentive Plans, Activity [Table Text Block] + References No definition available. + Details
Name: | star_ScheduleOfShareBasedCompensationPerformanceIncentivePlansActivityTableTextBlock
Namespace Prefix: | star_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration