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Regulatory Capital - Summary of Regulatory Capital Requirement (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Schedule Of Regulatory Assets And Liabilities [Line Items] |  |
Total capital (to risk-weighted assets), Actual, Amount | $ 264,452 | $ 212,276
Total capital (to risk-weighted assets), Actual, Ratio | 13.99% | 14.48%
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount | $ 151,223 | $ 117,280
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio | 8.00% | 8.00%
Tier 1 capital (to average assets), Actual, Amount | $ 249,918 | $ 195,775
Tier 1 capital (to average assets), Actual, Ratio | 13.22% | 13.35%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount | $ 113,427 | $ 58,659
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio | 6.00% | 4.00%
Common equity tier 1 capital, Actual Amount | $ 204,350 |
Common equity tier 1 capital, Actual Ratio | 10.81% |
Common equity tier 1 capital,For capital adequacy purposes, Amount | $ 85,067 |
Common equity tier 1 capital, For capital adequacy purpose, Ratio | 4.50% |
Tier 1 capital (to average assets), Actual, Amount | $ 249,918 | $ 195,775
Tier 1 capital (to average assets), Actual, Ratio | 9.82% | 9.76%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount | $ 101,800 | $ 80,236
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio | 4.00% | 4.00%
Bank [Member] |  |
Schedule Of Regulatory Assets And Liabilities [Line Items] |  |
Total capital (to risk-weighted assets), Actual, Amount | $ 237,348 | $ 192,604
Total capital (to risk-weighted assets), Actual, Ratio | 12.57% | 13.08%
Total capital (to risk-weighted assets), For capital adequacy purposes, Amount | $ 151,057 | $ 117,801
Total capital (to risk-weighted assets), For capital adequacy purposes, Ratio | 8.00% | 8.00%
Total capital (to risk-weighted assets), For well capitalized purpose, Amount | $ 188,821 | $ 147,251
Total capital (to risk-weighted assets), For well capitalized purpose, Ratio | 10.00% | 10.00%
Tier 1 capital (to average assets), Actual, Amount | $ 222,814 | $ 176,103
Tier 1 capital (to average assets), Actual, Ratio | 11.80% | 11.96%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount | $ 113,295 | $ 58,897
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio | 6.00% | 4.00%
Tier 1 capital (to average assets), For well capitalized purpose, Amount | $ 151,060 | $ 88,346
Tier 1 capital (to average assets), For well capitalized purposes, Ratio | 8.00% | 6.00%
Common equity tier 1 capital, Actual Amount | $ 222,814 |
Common equity tier 1 capital, Actual Ratio | 11.80% |
Common equity tier 1 capital,For capital adequacy purposes, Amount | $ 84,971 |
Common equity tier 1 capital, For capital adequacy purpose, Ratio | 4.50% |
Common equity tier 1 capital, For well capitalized purpose, Amount | $ 122,737 |
Common equity tier 1 capital, For well capitalized purposes, Ratio | 6.50% |
Tier 1 capital (to average assets), Actual, Amount | $ 222,814 | $ 176,103
Tier 1 capital (to average assets), Actual, Ratio | 8.77% | 8.80%
Tier 1 capital (to average assets), For capital adequacy purposes, Amount | $ 101,626 | $ 80,047
Tier 1 capital (to average assets), For capital adequacy purpose, Ratio | 4.00% | 4.00%
Tier 1 capital (to average assets), For well capitalized purpose, Amount | $ 127,032 | $ 100,059
Tier 1 capital (to average assets), For well capitalized purposes, Ratio | 5.00% | 5.00%

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- Definition The amount of total capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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- Definition The minimum Total risk based capital ratio (total 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 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 3: 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 + Details
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- Definition The amount of Total Capital required to be categorized as well as capitalized 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 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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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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