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Regulatory Capital Requirements (Tables)
12 Months Ended
Dec. 31, 2015
Regulatory Capital Requirements Abstract  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]

The Company’s and the Bank’s actual capital amounts and ratios as of December 31, 2015 and 2014 are as follows:

Minimum CapitalMinimum to be Well
Actual RequirementCapitalized
Amount Ratio Amount Ratio Amount Ratio
(Dollars in thousands)
Company Ratios
As of December 31, 2015
Total capital to risk-weighted assets$846,74817.29%$391,7238.00%$489,65410.00%
Tier 1 capital to risk-weighted assets$782,91215.99%$293,7926.00%$391,7238.00%
Common equity tier 1 capital to risk-weighted assets$594,48212.14%$220,3444.50%$318,2756.50%
Tier 1 capital to average total assets$782,91211.18%$280,0094.00%$350,0115.00%
As of December 31, 2014
Total capital to risk-weighted assets$851,43717.57%$387,7728.00%$484,71510.00%
Tier 1 capital to risk-weighted assets$776,52516.02%$193,8864.00%$290,8296.00%
Tier 1 capital to average total assets$776,52510.61%$292,7384.00%$365,9225.00%

Minimum CapitalMinimum to be Well
Actual RequirementCapitalized
Amount Ratio Amount Ratio Amount Ratio
(Dollars in thousands)
Bank Ratios
As of December 31, 2015
Total capital to risk-weighted assets$815,45816.70%$390,6888.00%$488,36010.00%
Tier 1 capital to risk-weighted assets$751,88615.40%$293,0166.00%$390,6888.00%
Common equity tier 1 capital to risk-weighted assets$751,88615.40%$219,7624.50%$317,4346.50%
Tier 1 capital to average total assets$751,88610.80%$278,3994.00%$347,9995.00%
As of December 31, 2014
Total capital to risk-weighted assets$820,88416.99%$386,4448.00%$483,05510.00%
Tier 1 capital to risk-weighted assets$746,17715.45%$193,2224.00%$289,8336.00%
Tier 1 capital to average total assets$746,17710.26%$290,8794.00%$363,5995.00%