Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Cash Flows [Abstract]
Unrealized gain in values of securities available-for-sale, income taxes	$ 333	$ 1,866

Unrealized gain in values of securities available-for-sale, income taxes.

No definition available.

Name:	wbhc_UnrealizedGainValueOfSecuritiesAvailableForSaleIncomeTaxes
Namespace Prefix:	wbhc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration