Note 4 - Originated Mortgage Servicing Rights (Detail) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Servicing Asset	$ 392,600,000	$ 403,500,000
First State Bank [Member]
Servicing Asset	$ 2,146,000
Servicing Fee Percentage	0.55%

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

Name:	us-gaap_ServicingAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant