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Regulatory Capital Requirements (Tables)
3 Months Ended
Mar. 31, 2017
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, 2017 and December 31, 2016 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, 2017
Total capital to risk-weighted assets$878,86720.05%$350,6798.00%$438,34910.00%
Tier 1 capital to risk-weighted assets$822,84718.77%$263,0106.00%$350,6798.00%
Common equity tier 1 capital to risk-weighted assets$626,70714.30%$197,2574.50%$284,9276.50%
Tier 1 capital to average total assets$822,84713.20%$249,2544.00%$311,5685.00%
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%

Minimum CapitalMinimum to be Well
Actual RequirementCapitalized
Amount Ratio Amount Ratio Amount Ratio
(Dollars in thousands)
Bank Ratios
As of March 31, 2017
Total capital to risk-weighted assets$862,76819.69%$350,5028.00%$438,12810.00%
Tier 1 capital to risk-weighted assets$806,97218.42%$262,8776.00%$350,5028.00%
Common equity tier 1 capital to risk-weighted assets$806,97218.42%$197,1574.50%$284,7836.50%
Tier 1 capital to average total assets$806,97213.01%$248,1334.00%$310,1675.00%
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%