XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Merger with Capella Education Company - Goodwill (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Aug. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Business Combination Segment Allocation [Line Items] |  |  |
Goodwill | $ 730,729 |  | $ 20,744
Strayer |  |  |
Business Combination Segment Allocation [Line Items] |  |  |
Goodwill | 337,381 |  | $ 6,800
Capella |  |  |
Business Combination Segment Allocation [Line Items] |  |  |
Goodwill | $ 393,348 |  |
Capella Merger |  |  |
Business Combination Segment Allocation [Line Items] |  |  |
Goodwill |  | $ 723,929 |
Capella Merger | Strayer |  |  |
Business Combination Segment Allocation [Line Items] |  |  |
Goodwill |  | 330,600 |
Capella Merger | Capella |  |  |
Business Combination Segment Allocation [Line Items] |  |  |
Goodwill |  | $ 393,300 |

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_BusinessCombinationSegmentAllocationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stra_StrayerSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stra_CapellaSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=stra_CapellaEducationCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |