Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

The effective date of the Amendment to the Credit Agreement.

+ References

No definition available.

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- Definition

The amount of the letter of credit used as collateral for the fidelity bonds.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The amount of the letter of credit used as collateral for the corporate headquarter operating lease.

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Line of credit facility covenant compliance quick ratio.

+ References

No definition available.

+ Details

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- Definition

Line of credit facility covenant minimum EBITDA.

+ References

No definition available.

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- Definition

Line Of Credit Facility Extended Expiration Date

+ References

No definition available.

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- Definition

Maximum extraordinary or non-recurring cash expenses to be included in Adjusted EBITDA.

+ References

No definition available.

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- Definition

Outstanding principle amount of term loan after amortization.

+ References

No definition available.

+ Details

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- Definition

Percentage of amortization for year five of the principal of credit facility.

+ References

No definition available.

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- Definition

Percentage of amortization for year four of the principal of credit facility.

+ References

No definition available.

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- Definition

Percentage of amortization for year one of the principal of credit facility.

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No definition available.

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- Definition

Percentage of amortization for year three of the principal of credit facility.

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No definition available.

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- Definition

Percentage of amortization for year two of the principal of credit facility.

+ References

No definition available.

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- Definition

Period in which the letters of credit automatically renew from annual expiration date.

+ References

No definition available.

+ Details

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- Definition

Upfront arrangement fees incurred in connection with the credit facility.

+ References

No definition available.

+ Details

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Namespace Prefix:	qnst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

No definition available.

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- 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.

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No definition available.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

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- Definition

Amount of the fee for available but unused credit capacity under the credit 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))
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- Definition

Description of the conditions for borrowing under the credit facility including the nature of any restrictions.

+ References

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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

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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- 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

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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- Definition

The loss recognized on termination of a contract.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 912
-SubTopic 275
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51673126&loc=d3e54681-109401

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- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Debt - Additional Information (Detail)			1 Months Ended		6 Months Ended
Debt - Additional Information (Detail)	Jun. 11, 2015 USD ($)	Jul. 17, 2014 USD ($)	Jun. 30, 2015 USD ($)	Nov. 30, 2011 USD ($)	Dec. 31, 2015 USD ($)	Feb. 15, 2013 USD ($)
Debt Instrument [Line Items]
Adjusted EBITDA					$ 5,000,000
Letter of credit agreement with a financial institution that is used as collateral for fidelity bonds placed with an insurance company					400,000
Letter of credit agreement with a financial institution that is used as collateral for the Company's corporate headquarters' operating lease					$ 500,000
Letters of credit automatically renew annually without amendment on the annual expiration date					30 days
Interest rate swap [Member]
Debt Instrument [Line Items]
Derivative notional amount outstanding in the swap agreement	$ 85,000,000
Principal balance at maturity	$ 35,000,000
Interest rate swap effectively fixes the Eurodollar rate	0.97%
Interest rate swap [Member] \| Other income, net [Member]
Debt Instrument [Line Items]
Expense recognized upon termination of agreement			$ 300,000
Quarter ended June 30, 2015 [Member]
Debt Instrument [Line Items]
Minimum EBITDA					$ 1
Quarter ended September 30, 2015 [Member]
Debt Instrument [Line Items]
Minimum EBITDA					2,000,000
Quarter ended December 31, 2015 [Member]
Debt Instrument [Line Items]
Minimum EBITDA					3,000,000
Quarter ending March 31, 2016 [Member]
Debt Instrument [Line Items]
Minimum EBITDA					4,000,000
Quarter ending June 30, 2016 [Member]
Debt Instrument [Line Items]
Minimum EBITDA					5,000,000
Term loan facility [Member]
Debt Instrument [Line Items]
Loan facility, total				$ 100,000,000
Percentage of amortization with principal of term loan facility year one				5.00%
Percentage of amortization with principal of term loan facility year two				10.00%
Percentage of amortization with principal of term loan facility year three				15.00%
Percentage of amortization with principal of term loan facility year four				20.00%
Percentage of amortization with principal of term loan facility year five				50.00%
Loan facility, term				5 years
Term loan facility [Member] \| Second Amended Agreement [Member] \| Base rate plus [Member]
Debt Instrument [Line Items]
Applicable margin on borrowings rate		1.75%
Term loan facility [Member] \| Second Amended Agreement [Member] \| Eurodollar rate plus [Member]
Debt Instrument [Line Items]
Applicable margin on borrowings rate		2.75%
Revolving loan facility [Member]
Debt Instrument [Line Items]
Loan facility, total				$ 200,000,000
Loan facility, term				5 years
Annual facility fee					$ 62,500
Annual unused fee, percentage					0.25%
Revolving loan facility, covenant terms					1. Minimum EBITDA as of the end of each fiscal quarter for the trailing twelve month period of not less than: (a) $1 for the quarter ended June 30, 2015; (b) $2,000,000 for the quarter ended September 30, 2015; (c) $3,000,000 for the quarter ended December 31, 2015; (d) $4,000,000 for the quarter ending March 31, 2016; (e) $5,000,000 for the quarter ending June 30, 2016. Thereafter, minimum EBITDA increases each quarter in $1,000,000 increments; provided that there shall be no loss in EBITDA greater than $2,000,000 in any fiscal quarter during such trailing four quarter period. 2. Minimum adjusted quick ratio as of the end of each month of not less than 1.25 to 1.00.
Minimum adjusted quick ratio					1.25
Outstanding amount			$ 15,000,000		$ 15,000,000
Revolving loan facility [Member] \| First Amendment [Member]
Debt Instrument [Line Items]
Loan Amendment date					Feb. 15, 2013
Loan facility, current						$ 100,000,000
Revolving loan facility [Member] \| Second Amendment [Member]
Debt Instrument [Line Items]
Loan facility, total		$ 100,000,000
Loan Amendment date					Jul. 17, 2014
Loan facility, current		50,000,000
Upfront arrangement fees incurred in connection with the term loan facility		300,000
Acceleration of unamortized deferred upfront costs		$ 300,000
Revolving loan facility [Member] \| Third Amendment [Member]
Debt Instrument [Line Items]
Loan facility, total	$ 50,000,000
Loan Amendment date					Jun. 11, 2015
Loan facility, current	25,000,000
Acceleration of unamortized deferred upfront costs	$ 500,000
Credit Agreement expiration date					Nov. 04, 2016
Credit Agreement extended expiration date					Jun. 11, 2017
Revolving loan facility [Member] \| Third Amendment [Member] \| Eurodollar rate plus [Member]
Debt Instrument [Line Items]
Applicable margin on borrowings rate	3.00%
Revolving loan facility [Member] \| Second Amended Agreement [Member] \| Base rate plus [Member]
Debt Instrument [Line Items]
Applicable margin on borrowings rate		1.375%
Revolving loan facility [Member] \| Second Amended Agreement [Member] \| Eurodollar rate plus [Member]
Debt Instrument [Line Items]
Applicable margin on borrowings rate		2.375%