STOCK-BASED COMPENSATION - Performance Units (Details) (2008 Plan, Performance Shares, USD $)	12 Months Ended
Dec. 31, 2013
2008 Plan \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Annual Grant Limit, Value	$ 1,000,000.0

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Annual Grant Limit, Value

No definition available.

Name:	bios_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAnnualGrantLimitValue
Namespace Prefix:	bios_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration