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Capital Requirements and Restrictions on Retained Earnings - Summary of Actual and Required Capital Amounts and Ratios (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital to Risk Weighted Assets, Actual Amount | $ 212,711 | $ 199,034
Total Capital to Risk Weighted Assets, Actual Ratio | 13.18% | 14.30%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount | $ 129,135 | $ 111,374
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio | 8.00% | 8.00%
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Amount | $ 195,974 | $ 181,661
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Ratio | 12.14% | 13.05%
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount | $ 96,851 | $ 55,687
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio | 6.00% | 4.00%
Common equity Tier 1 to Risk Weighted Assets, Actual Amount | $ 175,974 |
Common equity Tier 1 to Risk Weighted Assets, Actual Ratio | 10.90% |
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Amount | $ 72,638 |
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Ratio | 4.50% |
Tier 1 (Core) Capital to Average Assets, Actual Amount | $ 195,974 | $ 181,661
Tier 1 (Core) Capital to Average Assets, Actual Ratio | 8.73% | 8.39%
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Amount | $ 89,782 | $ 86,641
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Ratio | 4.00% | 4.00%
Bank [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital to Risk Weighted Assets, Actual Amount | $ 193,301 | $ 180,597
Total Capital to Risk Weighted Assets, Actual Ratio | 12.07% | 13.16%
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount | $ 128,132 | $ 109,758
Total Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio | 8.00% | 8.00%
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount | $ 160,166 | $ 137,198
Total Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio | 10.00% | 10.00%
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Amount | $ 178,353 | $ 164,835
Tier 1 (Core) Capital to Risk Weighted Assets, Actual Ratio | 11.14% | 12.01%
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Amount | $ 96,099 | $ 54,879
Tier 1 (Core) Capital to Risk Weighted Assets, For Capital Adequacy Purposes Ratio | 6.00% | 4.00%
Tier 1 (Core) Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 128,132 | $ 82,319
Tier 1 (Core) Capital to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 8.00% | 6.00%
Common equity Tier 1 to Risk Weighted Assets, Actual Amount | $ 170,974 |
Common equity Tier 1 to Risk Weighted Assets, Actual Ratio | 10.67% |
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Amount | $ 72,074 |
Common equity Tier 1 to Risk Weighted Assets, For Capital Adequacy Purposes Ratio | 4.50% |
Common equity Tier 1 to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 104,108 |
Common equity Tier 1 to Risk Weighted Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 6.50% |
Tier 1 (Core) Capital to Average Assets, Actual Amount | $ 178,353 | $ 164,835
Tier 1 (Core) Capital to Average Assets, Actual Ratio | 8.06% | 7.71%
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Amount | $ 88,464 | $ 85,503
Tier 1 (Core) Capital to Average Assets, For Capital Adequacy Purposes, Ratio | 4.00% | 4.00%
Tier 1 (Core) Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Amount | $ 110,581 | $ 106,878
Tier 1 (Core) Capital to Average Assets, To Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio | 5.00% | 5.00%

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- Definition The minimum amount of Tier 1 Risk Based Capital 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 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: 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=35709795&loc=SL5958568-112826 + Details
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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=35709795&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=35709795&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=35709795&loc=d3e65071-112826 + Details
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