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SUBSEQUENT EVENTS SUBSEQUENT EVENTS (Details) (Senior Secured Revolving Credit Facility)
 12 Months Ended 0 Months Ended
Dec. 31, 2014
Mar. 01, 2015
Quarters
Subsequent Event    
Borrowing capacity threshold for leverage covenants (as a percent) 25.00%bios_LineofCreditFacilityBorrowingCapacityPercentageThresholdforLeverageCovenants  
Subsequent Event | Third Amendment    
Subsequent Event    
Maximum net leverage ratio is consistent with prior quarters, number   4bios_MaximumNetLeverageRatioIsConsistentWithPriorQuartersNumber
/ bios_DebtAmendmentNumberAxis
= bios_ThirdAmendmentMember
/ us-gaap_DebtInstrumentAxis
= bios_SeniorSecuredRevolvingCreditFacilityMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Term of the agreement (in quarters)   4bios_AmendmentTerm
/ bios_DebtAmendmentNumberAxis
= bios_ThirdAmendmentMember
/ us-gaap_DebtInstrumentAxis
= bios_SeniorSecuredRevolvingCreditFacilityMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Borrowing capacity threshold for leverage covenants (as a percent)   5.00%bios_LineofCreditFacilityBorrowingCapacityPercentageThresholdforLeverageCovenants
/ bios_DebtAmendmentNumberAxis
= bios_ThirdAmendmentMember
/ us-gaap_DebtInstrumentAxis
= bios_SeniorSecuredRevolvingCreditFacilityMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember