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Regulatory Capital Requirements (Tables)
3 Months Ended
Mar. 31, 2016
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 March 31, 2016 and December 31, 2015 are as follows:

Minimum CapitalMinimum to be Well
Actual RequirementCapitalized
Amount Ratio Amount Ratio Amount Ratio
(Dollars in thousands)
Company Ratios
As of March 31, 2016
Total capital to risk-weighted assets$838,28417.67%$379,5708.00%$474,46310.00%
Tier 1 capital to risk-weighted assets$776,18116.36%$284,6786.00%$379,5708.00%
Common equity tier 1 capital to risk-weighted assets$585,14412.33%$213,5084.50%$308,4016.50%
Tier 1 capital to average total assets$776,18111.38%$272,7974.00%$340,9965.00%
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%

Minimum CapitalMinimum to be Well
Actual RequirementCapitalized
Amount Ratio Amount Ratio Amount Ratio
(Dollars in thousands)
Bank Ratios
As of March 31, 2016
Total capital to risk-weighted assets$819,73117.29%$379,2428.00%$474,50210.00%
Tier 1 capital to risk-weighted assets$757,82815.99%$284,4316.00%$379,2428.00%
Common equity tier 1 capital to risk-weighted assets$757,82815.99%$213,3234.50%$3,308,1346.50%
Tier 1 capital to average total assets$757,82811.16%$271,5384.00%$339,4235.00%
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%