Cash, cash equivalents and marketable securities.

No definition available.

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Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument Covenants Senior Leverage Ratios Maximum

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument Maturity Period

+ References

No definition available.

+ Details

Name:	fn_DebtInstrumentMaturityPeriod
Namespace Prefix:	fn_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility Extended Maturity Month and Year

+ References

No definition available.

+ Details

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Namespace Prefix:	fn_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Line Of Credit Facility Increase In Borrowing Capacity

+ References

No definition available.

+ Details

Name:	fn_LineOfCreditFacilityIncreaseInBorrowingCapacity
Namespace Prefix:	fn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility Minimum Quick Ratio

+ References

No definition available.

+ Details

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Namespace Prefix:	fn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum percentage of net income required per the credit agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	fn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum Debt Service Coverage Ratio

+ References

No definition available.

+ Details

Name:	fn_MinimumDebtServiceCoverageRatio
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum balance of deposit or security account in which could be effected by a control agreement or the equivalent under the local law.

+ References

No definition available.

+ Details

Name:	fn_MinimumDepositOrSecurityAccountEffectByControlAgreement
Namespace Prefix:	fn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The lowest amount of net worth required per the credit agreement.

+ References

No definition available.

+ Details

Name:	fn_MinimumNetWorthRequiredForCreditAgreement
Namespace Prefix:	fn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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 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

+ Details

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

- Definition

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

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Details

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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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- Details

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Data Type:	na
Balance Type:
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- Details

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- Details

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Borrowings - Additional Information (Detail) - USD ($)		1 Months Ended	6 Months Ended
Borrowings - Additional Information (Detail) - USD ($)	Jul. 24, 2017	Dec. 29, 2017	Dec. 29, 2017	Jun. 30, 2017
Line of Credit Facility [Line Items]
Line of credit facility borrowing capacity		$ 200,000,000	$ 200,000,000
Line of credit facility amounts outstanding		39,000,000	39,000,000	$ 34,000,000
Undrawn available credit facilities for long-term borrowing		$ 111,000,000	111,000,000
Extended maturity date		2018-01
Cash, cash equivalents and marketable securities at financial institutions located in the United States		$ 40,000,000	40,000,000
Deposits or securities		10,000,000	10,000,000
Minimum net worth required for credit agreement		200,000,000	$ 200,000,000
Percentage of quarterly net income required for credit agreement			50.00%
Minimum debt service coverage ratio			150.00%
Maximum senior leverage ratio			250.00%
Minimum quick ratio required for credit agreement			110.00%
Interest Rate Swap
Line of Credit Facility [Line Items]
Derivative, fixed interest rate	1.55%
Derivative, maturity date	2019-05
Net loss on derivative recognized in operations and comprehensive income			$ 23,000
LIBOR
Line of Credit Facility [Line Items]
Credit line interest rate			LIBOR rate plus a spread of 1.75% to 2.50%
LIBOR \| Minimum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage			1.75%
LIBOR \| Maximum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage			2.50%
Base Rate
Line of Credit Facility [Line Items]
Credit line interest rate			Base rate plus a spread of 0.75% to 1.50%, determined in accordance with the Facility Agreement
Base Rate \| Minimum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage			0.75%
Base Rate \| Maximum
Line of Credit Facility [Line Items]
Credit line interest rate, percentage			1.50%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility borrowing capacity		150,000,000	$ 150,000,000
Line of credit facility increase in borrowing capacity		100,000,000	$ 100,000,000
Line of credit expiration date			May 22, 2019
Line of credit facility amounts outstanding		$ 39,000,000	$ 39,000,000
Extended maturity date		2018-01
Revolving Credit Facility \| Minimum
Line of Credit Facility [Line Items]
Repayment duration			1 month
Revolving Credit Facility \| Maximum
Line of Credit Facility [Line Items]
Repayment duration			6 months
Revolving Credit Facility \| LIBOR
Line of Credit Facility [Line Items]
Credit line interest rate, percentage			1.75%
Term Loan Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility borrowing capacity		$ 50,000,000	$ 50,000,000
Line of credit expiration date			May 22, 2019
Line of credit facility amounts outstanding		$ 29,600,000	$ 29,600,000