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Regulatory Capital Requirements (Tables)
12 Months Ended
Dec. 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 December 31, 2016 and 2015 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, 2016
Total capital to risk-weighted assets$876,65719.62%$357,4048.00%$446,75610.00%
Tier 1 capital to risk-weighted assets$819,66218.35%$268,0536.00%$357,4048.00%
Common equity tier 1 capital to risk-weighted assets$627,73314.05%$201,0404.50%$290,3916.50%
Tier 1 capital to average total assets$819,66212.99%$252,3444.00%$315,4305.00%
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 December 31, 2016
Total capital to risk-weighted assets$857,25919.23%$356,5968.00%$445,74510.00%
Tier 1 capital to risk-weighted assets$800,54417.96%$267,4476.00%$356,5968.00%
Common equity tier 1 capital to risk-weighted assets$800,54417.96%$200,5854.50%$289,7346.50%
Tier 1 capital to average total assets$800,54412.75%$251,2004.00%$314,0005.00%
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%