Note 6 - FDIC For Loss Share Agreements (Detail) - Receivable from the FDIC (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Balance, beginning of period	$ 18,697
Other changes, net	(303)
Balance, end of period	15,340
Additional losses to OREO	201
Reimbursable expenses (income)	125
Accretion discounts and premiums, net	35
Reimbursements from the FDIC	$ (3,415)

Amount of increases to the indemnification asset due to additional estimated losses assumed by the Federal Deposit Insurance Corporation (FDIC), relating to loss sharing agreements with the FDIC.

No definition available.

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