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v2.4.1.9

Regulation (Details) | 12 Months Ended
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Dec. 31, 2014
Regulation Textual [Abstract] |
Average of median annual earning percentage | 8.00%stra_AverageOfMedianAnnualEarningPercentage
Average of median discretionary percentage | 20.00%stra_AverageOfMedianDiscretionaryPercentage
Debt to earnings rates description | A program would fail if the program's graduates have an annual income rate of 12% or greater and a discretionary income rate of 30% or greater.
Maximum [Member] |
Regulation Textual [Abstract] |
Average of median annual earning percentage | 12.00%stra_AverageOfMedianAnnualEarningPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember
Average of median discretionary percentage | 30.00%stra_AverageOfMedianDiscretionaryPercentage / us-gaap_RangeAxis = us-gaap_MaximumMember
Minimum [Member] |
Regulation Textual [Abstract] |
Average of median annual earning percentage | 8.00%stra_AverageOfMedianAnnualEarningPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember
Average of median discretionary percentage | 20.00%stra_AverageOfMedianDiscretionaryPercentage / us-gaap_RangeAxis = us-gaap_MinimumMember

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- Definition Average of median annual earning percentage. + References No definition available. + Details
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Namespace Prefix: | stra_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Average of median discretionary percentage. + References No definition available. + Details
Name: | stra_AverageOfMedianDiscretionaryPercentage
Namespace Prefix: | stra_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | stra_RegulationTextualAbstract
Namespace Prefix: | stra_
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Period Type: | duration

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- Definition Threshold for program to fail. + References No definition available. + Details
Name: | stra_ThresholdForProgramToFail
Namespace Prefix: | stra_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |