Note 6 - Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Detail) - TDRs That Were Restructured (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Commercial And Industrial [Member]
Number of Loans	10
Pre-Modification Recorded Investment	$ 886
Interest and Escrow Capitalized	7
Post-Modification Recorded Investment	893
Office Retail And Industrial [Member]
Number of Loans	3
Pre-Modification Recorded Investment	3,407
Funds Disbursed	293
Interest and Escrow Capitalized	9
Post-Modification Recorded Investment	3,709
Multi-Family [Member]
Number of Loans	1
Pre-Modification Recorded Investment	14,107
Forgiveness of Principal	(3,000)	[1]
Post-Modification Recorded Investment	11,107
Commercial Construction [Member]
Number of Loans	1
Pre-Modification Recorded Investment	17,508
Post-Modification Recorded Investment	17,508
Other Commerical Real Estate [Member]
Number of Loans	1
Pre-Modification Recorded Investment	174
Interest and Escrow Capitalized	74
Post-Modification Recorded Investment	248
Total Commercial Real Estate [Member]
Number of Loans	6
Pre-Modification Recorded Investment	35,196
Forgiveness of Principal	(3,000)	[1]
Funds Disbursed	293
Interest and Escrow Capitalized	83
Post-Modification Recorded Investment	32,572
Total Corporate Loans [Member]
Number of Loans	16
Pre-Modification Recorded Investment	36,082
Forgiveness of Principal	(3,000)	[1]
Funds Disbursed	293
Interest and Escrow Capitalized	90
Post-Modification Recorded Investment	33,465
Home Equity1 [Member]
Number of Loans	9
Pre-Modification Recorded Investment	523
Interest and Escrow Capitalized	15
Post-Modification Recorded Investment	538
1-4 Family Mortgages [Member]
Number of Loans	11
Pre-Modification Recorded Investment	1,440
Interest and Escrow Capitalized	79
Post-Modification Recorded Investment	1,519
Installment Loans [Member]
Number of Loans	1
Pre-Modification Recorded Investment	151
Interest and Escrow Capitalized	4
Post-Modification Recorded Investment	155
Total Consumer Loans [Member]
Number of Loans	21
Pre-Modification Recorded Investment	2,114
Interest and Escrow Capitalized	98
Post-Modification Recorded Investment	2,212
Total Restructured Loans [Member]
Number of Loans	37
Pre-Modification Recorded Investment	38,196
Forgiveness of Principal	(3,000)	[1]
Funds Disbursed	293
Interest and Escrow Capitalized	188
Post-Modification Recorded Investment	35,677
Restructured Loans, Still Accruing Interest [Member]
Number of Loans	34	[2]
Pre-Modification Recorded Investment	20,466	[2]
Forgiveness of Principal	(3,000)	[1],[2]
Funds Disbursed	293	[2]
Interest and Escrow Capitalized	111	[2]
Post-Modification Recorded Investment	17,850	[2]
Restructured Loans Included In Non Accrual [Member]
Number of Loans	3	[2]
Pre-Modification Recorded Investment	17,750	[2]
Forgiveness of Principal		[1],[2]
Funds Disbursed		[2]
Interest and Escrow Capitalized	77	[2]
Post-Modification Recorded Investment	17,827	[2]
Total Loans Restructured [Member]
Number of Loans	37
Pre-Modification Recorded Investment	38,196
Forgiveness of Principal	(3,000)	[1]
Funds Disbursed	293
Interest and Escrow Capitalized	188
Post-Modification Recorded Investment	$ 35,677

[1] These loans are still accruing interest as of December 31, 2011.

[2] These loans are included in non-accrual loans as of December 31, 2011.