Fair Value - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Transfers between level 1 and level 2	$ 0	$ 0	$ 0	$ 0

Fair value measurements transfers between level one and level two.

No definition available.

Name:	fac_FairValueMeasurementsTransfersBetweenLevelOneAndLevelTwo
Namespace Prefix:	fac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration