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ACQUISITIONS Acquisition and Integration Costs (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Business Combination, Separately Recognized Transactions [Line Items]      
Total $ 17,924bios_AcquisitionAndIntegrationExpenses $ 16,130bios_AcquisitionAndIntegrationExpenses $ 4,046bios_AcquisitionAndIntegrationExpenses
Acquisition and Integration Costs | All Current Acquirees      
Business Combination, Separately Recognized Transactions [Line Items]      
Legal and professional fees 6,931us-gaap_LegalFees
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
5,113us-gaap_LegalFees
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
2,941us-gaap_LegalFees
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
Financial advisory fees 0us-gaap_ProfessionalFees
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
2,413us-gaap_ProfessionalFees
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
0us-gaap_ProfessionalFees
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
Employee costs including redundant salaries and benefits and severance 2,016bios_Businesscombinationemployeerelatedcostsrelatedtointegration
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
3,554bios_Businesscombinationemployeerelatedcostsrelatedtointegration
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
806bios_Businesscombinationemployeerelatedcostsrelatedtointegration
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
Facilities consolidation and discontinuation 1,401bios_Businesscombinationfacilitiescostsrelatedtointegrationactivities
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
1,621bios_Businesscombinationfacilitiescostsrelatedtointegrationactivities
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
110bios_Businesscombinationfacilitiescostsrelatedtointegrationactivities
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
Bad debt expense and contractual adjustments related to acquired accounts receivable 5,430us-gaap_SalesAllowancesGoods
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
0us-gaap_SalesAllowancesGoods
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
0us-gaap_SalesAllowancesGoods
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
Legal settlement 334us-gaap_LitigationSettlementAmount
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
2,300us-gaap_LitigationSettlementAmount
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
0us-gaap_LitigationSettlementAmount
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
Other 1,812us-gaap_BusinessCombinationIntegrationRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
1,129us-gaap_BusinessCombinationIntegrationRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
189us-gaap_BusinessCombinationIntegrationRelatedCosts
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
Total $ 17,924bios_AcquisitionAndIntegrationExpenses
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
$ 16,130bios_AcquisitionAndIntegrationExpenses
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember
$ 4,046bios_AcquisitionAndIntegrationExpenses
/ us-gaap_BusinessAcquisitionAxis
= bios_AllCurrentAcquireesMember
/ us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsAxis
= bios_OtherAcquisitionandIntegrationExpensesMember