XML 35 R45.htm IDEA: XBRL DOCUMENT v2.4.1.9
Other Long-Term Liabilities (Details Textual) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 3 Months Ended
Jun. 30, 2007
Asset
Mar. 31, 2015
Dec. 31, 2014
Other Long -Term Liabilities (Textual)      
Sale price of one of campus buildings $ 5.8us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities    
Sale and lease back term for most of the campus building 10 years    
Gain on sale and lease back of one of campus buildings before tax 2.8us-gaap_SaleLeasebackTransactionDeferredGainGross    
Funds received from investor   2.8stra_FundsReceivedFromInvestor  
Sale and lease back term 10 years    
Number of assets sold 1stra_SaleLeaseBackTransactionNumberOfAssetsSold    
Deferred payment arrangements value   $ 2.7stra_DeferredPaymentArrangementValue $ 2.4stra_DeferredPaymentArrangementValue
Minimum [Member]      
Other Long -Term Liabilities (Textual)      
Leasehold improvements and long-term liability amortization period   5 years  
Maximum [Member]      
Other Long -Term Liabilities (Textual)      
Leasehold improvements and long-term liability amortization period   10 years