Core Deposit and Other Intangibles - Schedule of Finite-lived Intangible Assets Acquired (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	1 Months Ended
Feb. 10, 2012 Core Deposits SCB Bank	Jul. 31, 2012 Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Core deposit intangible and other intangibles acquired	$ 484	$ 483

Amount of assets, excluding financial assets and goodwill, lacking physical substance with a finite life acquired.

No definition available.

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