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Note 15 - Regulatory Capital
 9 Months Ended
Sep. 30, 2016
Notes to Financial Statements  
Regulatory Capital Requirements under Banking Regulations [Text Block]
15.
       
Regulatory Capital
 
Under current capital regulations, the Bank is required to comply with four separate capital adequacy standards. As of September 30, 2016, the Bank continues to be categorized as “well-capitalized” under the prompt corrective action regulations and continues to exceed all regulatory capital requirements. In 2016, a Capital Conservation Buffer (“CCB”) requirement became effective for banks. The CCB is designed to establish a capital range above minimum capital requirements and impose constraints on dividends, share buybacks and discretionary bonus payments when capital levels fall below prescribed levels. The minimum CCB in 2016 is 0.625% and increases 0.625% annually through 2019 to 2.5%. The CCB for the Bank at September 30, 2016 was 4.96%.
 
Set forth below is a summary of the Bank’s compliance with banking regulatory capital standards.
 
    September 30, 2016   December 31, 2015
    Amount   Percent of
Assets		   Amount   Percent of
Assets
    (Dollars in thousands)
                 
Tier I (leverage) capital:                                
Capital level   $ 528,168       8.88 %   $ 494,690       8.89 %
Requirement to be well capitalized     297,261       5.00       278,175       5.00  
Excess     230,907       3.88       216,515       3.89  
                                 
Common Equity Tier I risk-based capital:                                
Capital level   $ 528,168       12.44 %   $ 494,690       12.62  
Requirement to be well capitalized     275,911       6.50       254,768       6.50  
Excess     252,257       5.94       239,922       6.12  
                                 
Tier 1 risk-based capital:                                
Capital level   $ 528,168       12.44 %   $ 494,690       12.62 %
Requirement to be well capitalized     339,583       8.00       313,560       8.00  
Excess     188,585       4.44       181,130       4.62  
                                 
Total risk-based capital:                                
Capital level   $ 549,963       12.96 %   $ 516,226       13.17 %
Requirement to be well capitalized     424,479       10.00       391,950       10.00  
Excess     125,484       2.96       124,276       3.17  
 
The Holding Company is subject to the same regulatory capital requirements as the Bank. As of September 30, 2016, the Holding Company continues to be categorized as “well-capitalized” under the prompt corrective action regulations and continues to exceed all regulatory capital requirements. The CCB for the Holding Company at September 30, 2016 was 4.87%.
 
Set forth below is a summary of the Holding Company’s compliance with banking regulatory capital standards.
 
    September 30, 2016   December 31, 2015
    Amount   Percent of
Assets		   Amount   Percent of
Assets
    (Dollars in thousands)
                 
Tier I (leverage) capital:                                
Capital level   $ 523,428       8.80 %   $ 490,919       8.84 %
Requirement to be well capitalized     297,458       5.00       277,611       5.00  
Excess     225,970       3.80       213,308       3.84  
                                 
Common Equity Tier I risk-based capital:                                
Capital level   $ 496,605       11.72 %   $ 462,883       11.83  
Requirement to be well capitalized     275,404       6.50       254,335       6.50  
Excess     221,201       5.22       208,548       5.33  
                                 
Tier 1 risk-based capital:                                
Capital level   $ 523,428       12.35 %   $ 490,919       12.55 %
Requirement to be well capitalized     338,958       8.00       313,028       8.00  
Excess     184,470       4.35       177,891       4.55  
                                 
Total risk-based capital:                                
Capital level   $ 545,223       12.87 %   $ 512,454       13.10 %
Requirement to be well capitalized     423,698       10.00       391,285       10.00  
Excess     121,525       2.87       121,169       3.10