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Regulatory Capital Requirements (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Total capital to risk weighted assets: |  |
Total capital to risk weighted assets, Actual Amount | $ 410,831 | $ 316,314
Total capital to risk weighted assets, Actual Ratio ( as a percentage) | 15.98% | 13.28%
Total capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Amount | $ 205,661 | $ 190,257
Total capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 8.00% | 8.00%
Tier 1 capital to risk weighted assets: |  |
Tier 1 capital to risk weighted assets, Actual Amount | $ 392,520 | $ 304,324
Tier 1 capital to risk weighted assets, Actual Ratio ( as a percentage) | 15.27% | 12.78%
Tier 1 capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Amount | $ 154,246 | $ 142,895
Tier 1 capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 6.00% | 6.00%
Common Equity Tier 1 (CET1) to risk weighted assets: |  |
Common Equity Tier 1 (CET1) to risk weighted, Actual Amount | $ 353,995 | $ 266,760
Common Equity Tier 1 (CET1) to risk weighted, Actual Ratio ( as a percentage) | 13.77% | 11.20%
Common Equity Tier 1 (CET1) to risk weighted, Minimum Amount Required for Adequately Capitalized Amount | $ 115,684 | $ 107,171
Common Equity Tier 1 (CET1) to risk weighted, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 4.50% | 4.50%
Tier 1 capital to average assets: |  |
Tier 1 capital to average, Actual Amount | $ 392,520 | $ 304,324
Tier 1 capital to average, Actual Ratio ( as a percentage) | 12.25% | 10.07%
Tier 1 capital to average, Minimum Amount Required for Adequately Capitalized Amount | $ 128,178 | $ 120,850
Tier 1 capital to average, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 4.00% | 4.00%
Bank |  |
Total capital to risk weighted assets: |  |
Total capital to risk weighted assets, Actual Amount | $ 367,972 | $ 325,465
Total capital to risk weighted assets, Actual Ratio ( as a percentage) | 14.28% | 13.61%
Total capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Amount | $ 206,083 | $ 191,267
Total capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 8.00% | 8.00%
Total capital to risk weighted assets, Minimum Amount To Be Well Capitalized Amount | $ 257,604 | $ 239,084
Total capital to risk weighted assets, Minimum Amount To Be Well Capitalized Ratio (as a percentage) | 10.00% | 10.00%
Tier 1 capital to risk weighted assets: |  |
Tier 1 capital to risk weighted assets, Actual Amount | $ 349,662 | $ 313,474
Tier 1 capital to risk weighted assets, Actual Ratio ( as a percentage) | 13.57% | 13.11%
Tier 1 capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Amount | $ 154,562 | $ 143,450
Tier 1 capital to risk weighted assets, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 6.00% | 6.00%
Tier 1 capital to risk weighted assets, Minimum Amount To Be Well Capitalized Amount | $ 206,083 | $ 191,267
Tier 1 capital to risk weighted assets, Minimum Amount To Be Well Capitalized Ratio (asa percentage) | 8.00% | 8.00%
Common Equity Tier 1 (CET1) to risk weighted assets: |  |
Common Equity Tier 1 (CET1) to risk weighted, Actual Amount | $ 349,662 | $ 313,474
Common Equity Tier 1 (CET1) to risk weighted, Actual Ratio ( as a percentage) | 13.57% | 13.11%
Common Equity Tier 1 (CET1) to risk weighted, Minimum Amount Required for Adequately Capitalized Amount | $ 115,922 | $ 107,588
Common Equity Tier 1 (CET1) to risk weighted, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 4.50% | 4.50%
Common Equity Tier 1 (CET1) to risk weighted, Minimum Amount To Be Well Capitalized Amount | $ 167,442 | $ 155,404
Common Equity Tier 1 (CET1) to risk weighted, Minimum Amount To Be Well Capitalized Ratio (as a percentage) | 6.50% | 6.50%
Tier 1 capital to average assets: |  |
Tier 1 capital to average, Actual Amount | $ 349,662 | $ 313,474
Tier 1 capital to average, Actual Ratio ( as a percentage) | 10.89% | 10.35%
Tier 1 capital to average, Minimum Amount Required for Adequately Capitalized Amount | $ 128,409 | $ 121,169
Tier 1 capital to average, Minimum Amount Required for Adequately Capitalized Ratio ( as a percentage) | 4.00% | 4.00%
Tier 1 capital to average, Minimum Amount To Be Well Capitalized Amount | $ 160,511 | $ 151,461
Tier 1 capital to average, Minimum Amount To Be Well Capitalized Ratio ( as a percentage) | 5.00% | 5.00%

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- Definition The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826 + Details
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