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Regulatory Capital (Tables) | 6 Months Ended
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Jun. 30, 2018
Banking and Thrift [Abstract] |
Summary of Regulatory Capital Requirement | Horizon and the Bank’s actual and required capital ratios as of June 30, 2018 and December 31, 2017 were as follows:
|  | Actual |  |  | Required for Capital1 Adequacy Purposes |  |  | Required For Capital1 Adequacy Purposes with Capital Buffer |  |  | Well Capitalized Under Prompt1 Corrective Action Provisions |
|  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 403,480 |  |  |  | 13.07 | % |  |  | 246,952 |  |  |  | 8.00 | % |  |  | 285,539 |  |  |  | 9.25 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 392,814 |  |  |  | 12.77 | % |  |  | 246,109 |  |  |  | 8.00 | % |  |  | 284,563 |  |  |  | 9.25 | % |  | $ | 307,636 |  |  |  | 10.00 | %
Tier 1 capital1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  |  | 386,409 |  |  |  | 12.52 | % |  |  | 185,214 |  |  |  | 6.00 | % |  |  | 223,800 |  |  |  | 7.25 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 375,684 |  |  |  | 12.21 | % |  |  | 184,581 |  |  |  | 6.00 | % |  |  | 223,035 |  |  |  | 7.25 | % |  |  | 246,108 |  |  |  | 8.00 | %
Common equity tier 1 capital1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  |  | 347,946 |  |  |  | 11.27 | % |  |  | 138,910 |  |  |  | 4.50 | % |  |  | 177,497 |  |  |  | 5.75 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 375,684 |  |  |  | 12.21 | % |  |  | 138,436 |  |  |  | 4.50 | % |  |  | 176,890 |  |  |  | 5.75 | % |  |  | 199,963 |  |  |  | 6.50 | %
Tier 1 capital1 (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  |  | 386,409 |  |  |  | 9.94 | % |  |  | 155,556 |  |  |  | 4.00 | % |  |  | 155,556 |  |  |  | 4.00 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 375,684 |  |  |  | 9.65 | % |  |  | 155,805 |  |  |  | 4.00 | % |  |  | 155,805 |  |  |  | 4.00 | % |  |  | 194,756 |  |  |  | 5.00 | %
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total capital1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  | $ | 384,800 |  |  |  | 12.91 | % |  | $ | 238,543 |  |  |  | 8.00 | % |  | $ | 275,816 |  |  |  | 9.25 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 382,788 |  |  |  | 12.85 | % |  |  | 238,386 |  |  |  | 8.00 | % |  |  | 275,634 |  |  |  | 9.25 | % |  | $ | 297,982 |  |  |  | 10.00 | %
Tier 1 capital1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  |  | 368,355 |  |  |  | 12.35 | % |  |  | 178,907 |  |  |  | 6.00 | % |  |  | 216,180 |  |  |  | 7.25 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 366,343 |  |  |  | 12.29 | % |  |  | 178,790 |  |  |  | 6.00 | % |  |  | 216,038 |  |  |  | 7.25 | % |  |  | 238,386 |  |  |  | 8.00 | %
Common equity tier 1 capital1 (to risk-weighted assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  |  | 329,892 |  |  |  | 11.06 | % |  |  | 134,181 |  |  |  | 4.50 | % |  |  | 171,454 |  |  |  | 5.75 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 366,343 |  |  |  | 12.29 | % |  |  | 134,092 |  |  |  | 4.50 | % |  |  | 171,340 |  |  |  | 5.75 | % |  |  | 193,689 |  |  |  | 6.50 | %
Tier 1 capital1 (to average assets) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consolidated |  |  | 368,355 |  |  |  | 9.92 | % |  |  | 148,503 |  |  |  | 4.00 | % |  |  | 148,503 |  |  |  | 4.00 | % |  |  | N/A |  |  |  | N/A |
Bank |  |  | 366,343 |  |  |  | 9.89 | % |  |  | 148,116 |  |  |  | 4.00 | % |  |  | 148,116 |  |  |  | 4.00 | % |  |  | 185,145 |  |  |  | 5.00 | %

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