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v2.4.1.9

Restructuring and Related Charges (Details Textual) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2015 | Dec. 31, 2013 Campus | Dec. 31, 2014
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring liabilities | $ 5.7 us-gaap_RestructuringReserveCurrent |  | $ 6.0 us-gaap_RestructuringReserveCurrent
Campus location closed |  | 20 stra_CampusLocationClosed |
Lease term expire |  | 2022 |
Lease marginal borrowing rate | 4.50%stra_MarginalBorrowingRateOfLease |  |
Lease and Related Costs, Net [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Contractual obligation |  | 36.0 us-gaap_ContractualObligation / us-gaap_RestructuringCostAndReserveAxis = stra_LeaseAndRelatedCostsMember |

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- Definition Campus location closed. + References No definition available. + Details
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Namespace Prefix: | stra_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The last year for which all current leases will expire. + References No definition available. + Details
Name: | stra_LeaseTermExpire
Namespace Prefix: | stra_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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- Definition Marginal borrowing rate of lease. + References No definition available. + Details
Name: | stra_MarginalBorrowingRateOfLease
Namespace Prefix: | stra_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |