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Regulatory Capital (Tables)
3 Months Ended
Mar. 31, 2021
Banking and Thrift, Interest [Abstract]  
Summary of Regulatory Capital Requirement
Horizon and the Bank’s actual and required capital ratios as of March 31, 2021 and December 31, 2020 were as follows:
Actual
Required for Capital
Adequacy Purposes(1)
Required For Capital
Adequacy Purposes
with Capital Buffer(1)
Well Capitalized 
Under Prompt Corrective Action
Provisions(1)
AmountRatioAmountRatioAmountRatioAmountRatio
March 31, 2021
Total capital (to risk–weighted assets)(1)
Consolidated$669,098 16.94 %$315,985 8.00 %$414,730 10.50 %N/AN/A
Bank548,682 13.86 %316,700 8.00 %415,668 10.50 %$395,874 10.00 %
Tier 1 capital (to risk–weighted assets)(1)
Consolidated622,085 15.75 %236,985 6.00 %335,728 8.50 %N/AN/A
Bank503,222 12.71 %237,556 6.00 %336,537 8.50 %316,741 8.00 %
Common equity tier 1 capital (to risk–weighted assets)(1)
Consolidated506,877 12.84 %177,644 4.50 %276,335 7.00 %N/AN/A
Bank503,222 12.71 %178,167 4.50 %277,148 7.00 %257,352 6.50 %
Tier 1 capital (to average assets)(1)
Consolidated622,085 10.82 %229,976 4.00 %229,976 4.00 %N/AN/A
Bank503,222 8.81 %228,478 4.00 %228,478 4.00 %285,597 5.00 %
December 31, 2020
Total capital (to risk–weighted assets)(1)
Consolidated$648,804 14.91 %$348,024 8.00 %$456,782 10.50 %N/AN/A
Bank532,315 12.21 %348,810 8.00 %457,813 10.50 %$436,013 10.00 %
Tier 1 capital (to risk–weighted assets)(1)
Consolidated607,340 13.96 %261,018 6.00 %369,775 8.50 %N/AN/A
Bank492,221 11.29 %261,606 6.00 %370,609 8.50 %348,808 8.00 %
Common equity tier 1 capital (to risk–weighted assets)(1)
Consolidated491,281 11.29 %195,764 4.50 %304,522 7.00 %N/AN/A
Bank492,221 11.29 %196,205 4.50 %305,207 7.00 %283,407 6.50 %
Tier 1 capital (to average assets)(1)
Consolidated607,340 10.68 %227,507 4.00 %227,507 4.00 %N/AN/A
Bank492,221 8.71 %226,158 4.00 %226,158 4.00 %282,697 5.00 %
(1) As defined by regulatory agencies