Fair Value - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Transfers between level 1 and level 2	$ 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