Annual report pursuant to Section 13 and 15(d)

Other Informations - Investment in Equity Affiliate (Details)

v2.4.1.9
Other Informations - Investment in Equity Affiliate (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]      
Investment in equity investee $ (19.1)us-gaap_PaymentsToAcquireEquityMethodInvestments $ 0us-gaap_PaymentsToAcquireEquityMethodInvestments $ 0us-gaap_PaymentsToAcquireEquityMethodInvestments
Playco Holdings Limited [Member]      
Schedule of Equity Method Investments [Line Items]      
Investment in equity investee $ (19.1)us-gaap_PaymentsToAcquireEquityMethodInvestments
/ dei_LegalEntityAxis
= strza_PlaycoHoldingsLimitedMember
   
Equity Method Investment, Ownership Percentage 40.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= strza_PlaycoHoldingsLimitedMember