Note 3 - Loans and Allowance for Credit Losses (Details) - Loans by Delinquency and Nonaccrual Status (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	$ 1,785,530	$ 2,050,959
Past Due30-59 Days Past Due and Accruing	15,595	20,794
60-89 Days Past Due and Accruing	4,907	6,695
90 days or More and Accruing	410	614
Nonaccrual	21,302	32,295
Total Loans	1,827,744	2,111,357
Commercial Portfolio Segment [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	336,497	333,474
Past Due30-59 Days Past Due and Accruing	677	754
60-89 Days Past Due and Accruing	383	278
Nonaccrual	1,267	5,610
Total Loans	338,824	340,116
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	364,159	401,331
Commercial Real Estate Portfolio Segment [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	586,619	616,276
Past Due30-59 Days Past Due and Accruing	4,012	7,941
60-89 Days Past Due and Accruing	2,473	2,809
Nonaccrual	3,549	5,901
Total Loans	596,653	632,927
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	799,019	916,594
Construction Portfolio Segment [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	10,275	7,984
Nonaccrual	448
Total Loans	10,723	7,984
Construction Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	13,896	16,515
Residential Portfolio Segment [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	173,082	220,032
Past Due30-59 Days Past Due and Accruing	2,789	1,510
60-89 Days Past Due and Accruing	325	683
Nonaccrual		233
Total Loans	176,196	222,458
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	185,057	234,035
Consumer Portfolio Segment [Member] | Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	396,725	455,007
Past Due30-59 Days Past Due and Accruing	3,035	4,021
60-89 Days Past Due and Accruing	606	1,184
90 days or More and Accruing	410	455
Nonaccrual	112	31
Total Loans	400,888	460,698
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	465,613	542,882
Originated Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	1,503,198	1,632,773
Past Due30-59 Days Past Due and Accruing	10,513	14,226
60-89 Days Past Due and Accruing	3,787	4,954
90 days or More and Accruing	410	455
Nonaccrual	5,376	11,775
Total Loans	1,523,284	1,664,183
Purchased Non-Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	45,755	65,567
Past Due30-59 Days Past Due and Accruing	4,237	1,757
60-89 Days Past Due and Accruing	180	64
90 days or More and Accruing		4
Nonaccrual	3,618	7,499
Total Loans	53,790	74,891
Purchased Covered Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current and Accruing	236,577	352,619
Past Due30-59 Days Past Due and Accruing	845	4,811
60-89 Days Past Due and Accruing	940	1,677
90 days or More and Accruing		155
Nonaccrual	12,308	13,021
Total Loans	$ 250,670	$ 372,283