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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) (Senior Unsecured 10 1/4% Notes)
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Mar. 25, 2010
Debt Instrument        
Debt Instrument, Interest Rate, Stated Percentage 10.25%us-gaap_DebtInstrumentInterestRateStatedPercentage      
Unsecured Debt        
Debt Instrument        
Debt Instrument, Interest Rate, Stated Percentage 10.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= bios_SeniorUnsecured10.25NotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember
10.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= bios_SeniorUnsecured10.25NotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember
10.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= bios_SeniorUnsecured10.25NotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember
10.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= bios_SeniorUnsecured10.25NotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_UnsecuredDebtMember