Name:	frs_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsEquivalentNumberOfSharesGrantedAmount
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Share-based compensation arrangement by share-based payment award, compensation cost, paid in cash, percent.

No definition available.

Name:	frs_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCostPaidInCashPercent
Namespace Prefix:	frs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Sharebased compensation arrangement by sharebased payment award compensation cost paid in common shares percent.

No definition available.

Name:	frs_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCostPaidInCommonSharesPercent
Namespace Prefix:	frs_
Data Type:	num:percentItemType
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Period Type:	duration

Stock issued to key employees and non-employees during period, shares, restricted stock award.

No definition available.

Name:	frs_StockIssuedToKeyEmployeesAndNonEmployeesDuringPeriodSharesRestrictedStockAward
Namespace Prefix:	frs_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

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.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

Net number of non-option equity instruments granted to participants.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of share instruments newly issued under a share-based compensation plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
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Period Type:	duration

Amount of capitalized and expensed compensation cost from equity-based compensation arrangements.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

No definition available.

Name:	us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

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Name:	frs_SharedBasedCompensationArrangementByShareBasedPaymentPlanPlanParticipantAxis=us-gaap_DirectorMember
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Name:	frs_SharedBasedCompensationArrangementByShareBasedPaymentPlanPlanParticipantAxis=us-gaap_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	frs_SharedBasedCompensationArrangementByShareBasedPaymentPlanPlanParticipantAxis=frs_KeyEmployeesExcludingChiefExecutiveOfficerMember
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