STOCK-BASED COMPENSATION - Performance Units (Details) (Key Employees, Performance Shares, USD $)	12 Months Ended
Dec. 31, 2014
Equity Incentive Plans
Grants since inception of plan (in shares)	0
2008 Plan
Equity Incentive Plans
Maximum annual cash award	1,000,000.0

The number of grants made since inception of the plan on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

No definition available.

Name:	bios_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrants
Namespace Prefix:	bios_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration