Employee Benefit Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Sale Of Subsidiary [Abstract]
Defined contribution plan employer matching contribution percent for three percent of employee contribution	100.00%
Initial employee salary percentage with full employer contribution	3.00%
Defined contribution plan employer matching contribution percent for two percent of employee contribution	50.00%
Additional employee salary percentage with partly employer contribution	2.00%
Company's contributions to Plan	$ 0.7	$ 0.6	$ 0.6

Additional employee salary percentage with partly employer contribution.

No definition available.

Name:	fac_AdditionalEmployeeSalaryPercentageWithPartlyEmployerContribution
Namespace Prefix:	fac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Defined contribution plan employer matching contribution percent for three percent of employee contribution.

+ References

No definition available.

+ Details

Name:	fac_DefinedContributionPlanEmployerMatchingContributionPercentForThreePercentOfEmployeeContribution
Namespace Prefix:	fac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Defined contribution plan employer matching contribution percent for two percent of employee contribution.

+ References

No definition available.

+ Details

Name:	fac_DefinedContributionPlanEmployerMatchingContributionPercentForTwoPercentOfEmployeeContribution
Namespace Prefix:	fac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Initial employee salary percentage with full employer contribution.

+ References

No definition available.

+ Details

Name:	fac_InitialEmployeeSalaryPercentageWithFullEmployerContribution
Namespace Prefix:	fac_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	fac_ScheduleOfSaleOfSubsidiaryAbstract
Namespace Prefix:	fac_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

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