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Note 22 - Regulatory Matters (Details) - Capital Amounts and Ratios for the Company and Bank - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 capital (to risk weighted assets)	4.50%
CET1 capital (to risk weighted assets)	6.50%
Total capital (to risk weighted assets), minimum required for capital adequacy purposes	8.00%	8.00%
Total capital (to risk weighted assets), to be well capitalized under prompt corrective action	10.00%	10.00%
Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes	6.00%	4.00%
Tier 1 capital (to risk weighted assets), to be well capitalized under prompt corrective action	8.00%	6.00%
Tier 1 capital (to average assets), minimum required for capital adequacy purposes	4.00%	3.00%
Tier 1 capital (to average assets), to be well capitalized under prompt corrective action	5.00%	5.00%
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 capital (to risk weighted assets) (in Dollars)	$ 632,408
CET1 capital (to risk weighted assets)	10.68%
Total capital (to risk weighted assets), actual (in Dollars)	$ 755,212	$ 631,340
Total capital (to risk weighted assets), ratio	12.75%	12.97%
Tier 1 capital (to risk weighted assets), actual (in Dollars)	$ 632,408	$ 505,864
Tier 1 capital (to risk weighted assets), ratio	10.68%	10.39%
Tier 1 capital (to average assets), actual (in Dollars)	$ 632,408	$ 505,864
Tier 1 capital (to average assets), ratio	10.90%	10.69%
Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
CET1 capital (to risk weighted assets) (in Dollars)	$ 620,879
CET1 capital (to risk weighted assets)	10.52%
Total capital (to risk weighted assets), actual (in Dollars)	$ 673,442	$ 568,637
Total capital (to risk weighted assets), ratio	11.41%	11.73%
Tier 1 capital (to risk weighted assets), actual (in Dollars)	$ 620,879	$ 522,637
Tier 1 capital (to risk weighted assets), ratio	10.52%	10.78%
Tier 1 capital (to average assets), actual (in Dollars)	$ 620,879	$ 522,637
Tier 1 capital (to average assets), ratio	10.74%	11.09%

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The amount of CET1 capital as defined in the regulations.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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