Debt Instrument, Interest Rate, Floor

No definition available.

Name:	bcor_DebtInstrumentInterestRateFloor
Namespace Prefix:	bcor_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Periodic Payment, Principal, Percent

+ References

No definition available.

+ Details

Name:	bcor_DebtInstrumentPeriodicPaymentPrincipalPercent
Namespace Prefix:	bcor_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Borrowing Capacity, Multiple

+ References

No definition available.

+ Details

Name:	bcor_LineofCreditFacilityBorrowingCapacityMultiple
Namespace Prefix:	bcor_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Periodic Payment, Principal, Prepayment

+ References

No definition available.

+ Details

Name:	bcor_LineofCreditFacilityPeriodicPaymentPrincipalPrepayment
Namespace Prefix:	bcor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line of Credit Facility, Periodic Payment, Principal multiple

+ References

No definition available.

+ Details

Name:	bcor_LineofCreditFacilityPeriodicPaymentPrincipalmultiple
Namespace Prefix:	bcor_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Long-term Debt, Prepayment Penalty, Percent

+ References

No definition available.

+ Details

Name:	bcor_LongtermDebtPrepaymentPenaltyPercent
Namespace Prefix:	bcor_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payment applied to principal.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

No definition available.

+ Details

Name:	us-gaap_RepaymentsOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_RepaymentsOfLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=bcor_SeniorSecuredCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=bcor_TaxACTHDVest2015CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=bcor_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=bcor_SeniorConvertibleNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt TaxAct- Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
Debt TaxAct- Narrative (Details) - USD ($)	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2016	May 22, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Principal amount	$ 363,200,000	$ 363,200,000			$ 436,059,000
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility				$ 425,000,000
Principal amount	360,000,000	360,000,000			0
Minimum credit facility aggregate principal amount due		5,000,000
Line of credit facility, periodic payment, principal, prepayment		2,000,000
Periodic payment, principal multiple		$ 1,000,000
Long-term debt, prepayment penalty, percent		1.00%
TaxACT - HD Vest 2015 Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount	0	$ 0			$ 260,000,000
Revolving Credit Facility [Member] \| Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility				50,000,000
Revolving Credit Facility [Member] \| Senior Secured Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Variable interest rate		3.25%
Term Loan [Member] \| Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Principal amount				$ 375,000,000
Repayments of term loan	15,000,000
Term Loan [Member] \| Senior Secured Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, floor		1.00%
Variable interest rate		3.75%
Term Loan [Member] \| TaxACT - HD Vest 2015 Credit Facility [Member]
Debt Instrument [Line Items]
Repayments of lines of credit		$ 64,000,000	$ 60,000,000
Minimum [Member] \| Revolving Credit Facility [Member] \| Senior Secured Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Variable interest rate		2.75%
Maximum [Member] \| Revolving Credit Facility [Member] \| Senior Secured Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Variable interest rate		3.25%
Maximum [Member] \| Term Loan [Member] \| Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, periodic payment, principal, percent		0.25%
Line of Credit [Member] \| Revolving Credit Facility [Member] \| Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity	2,000,000	$ 2,000,000
Line of credit facility, borrowing capacity, multiple	$ 1,000,000	$ 1,000,000
Senior Convertible Notes [Member]
Debt Instrument [Line Items]
Repurchased face amount			28,400,000
Repurchase amount			$ 20,700,000