Subsequent Event (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
Feb. 19, 2014
Subsequent Events [Abstract]
Negative Premium On Branch Sale	$ 7.0
Deposits Sold In Branch Sale	226
Loans Sold In Branch Sale	$ 95

The amount of cash consideration transferred by the seller to the buyer of bank branches and associated loans and deposits.

No definition available.

Name:	stsa_NegativePremiumOnBranchSale
Namespace Prefix:	stsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration