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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITALl - Bank's Actual Capital Ratios (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Orrstown Financial Services, Inc. [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual, Amount, Total capital to risk weighted assets | $ 119,713 us-gaap_Capital / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | $ 104,637 us-gaap_Capital / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Actual, Amount, Tier 1 capital to risk weighted assets | 110,750 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 95,741 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Actual, Amount, Tier 1 capital to average assets | 110,750 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 95,741 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Actual, Ratio, Total capital to risk weighted assets | 16.80%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 15.00%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Actual, Ratio, Tier 1 capital to risk weighted assets | 15.60%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 13.70%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Actual, Ratio, Tier 1 capital to average assets | 9.50%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 8.10%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Minimum Capital Requirement, Amount, Total capital to risk weighted assets | 56,859 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 55,926 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Minimum Capital Requirement, Amount, Tier 1 capital to risk weighted assets | 28,429 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 27,963 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Minimum Capital Requirement, Amount, Tier 1 capital to average assets | 46,496 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 47,058 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Minimum Capital Requirement, Ratio, Total capital to risk weighted assets | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Minimum Capital Requirement, Ratio, Tier 1 capital to risk weighted assets | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Minimum Capital Requirement, Ratio, Tier 1 capital to average assets | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownFinancialServicesIncMember
Orrstown Bank [Member] |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Actual, Amount, Total capital to risk weighted assets | 118,540 us-gaap_Capital / dei_LegalEntityAxis = orrf_OrrstownBankMember | 102,806 us-gaap_Capital / dei_LegalEntityAxis = orrf_OrrstownBankMember
Actual, Amount, Tier 1 capital to risk weighted assets | 109,581 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = orrf_OrrstownBankMember | 93,915 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = orrf_OrrstownBankMember
Actual, Amount, Tier 1 capital to average assets | 109,581 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = orrf_OrrstownBankMember | 93,915 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = orrf_OrrstownBankMember
Actual, Ratio, Total capital to risk weighted assets | 16.70%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 14.70%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Actual, Ratio, Tier 1 capital to risk weighted assets | 15.40%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 13.40%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Actual, Ratio, Tier 1 capital to average assets | 9.40%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 8.00%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum Capital Requirement, Amount, Total capital to risk weighted assets | 56,835 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownBankMember | 55,893 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum Capital Requirement, Amount, Tier 1 capital to risk weighted assets | 28,417 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownBankMember | 27,947 us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum Capital Requirement, Amount, Tier 1 capital to average assets | 46,518 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownBankMember | 47,077 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum Capital Requirement, Ratio, Total capital to risk weighted assets | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum Capital Requirement, Ratio, Tier 1 capital to risk weighted assets | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum Capital Requirement, Ratio, Tier 1 capital to average assets | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount, Total capital to risk weighted assets | 71,043 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = orrf_OrrstownBankMember | 69,866 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount, Tier 1 capital to risk weighted assets | 42,626 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = orrf_OrrstownBankMember | 41,920 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Amount, Tier 1 capital to average assets | $ 58,148 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = orrf_OrrstownBankMember | $ 58,846 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio, Total capital to risk weighted assets | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio, Tier 1 capital to risk weighted assets | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember
Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio, Tier 1 capital to average assets | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = orrf_OrrstownBankMember

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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 amount of Total 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 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 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 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 Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in 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 + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + 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 Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. + 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 amount of Tier 1 Leverage 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 amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations. + 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 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 Tier 1 Leverage Capital required to be categorized as well 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 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 Risk Based Capital as defined in the regulations. + 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 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 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 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 Tier 1 Risk Based Capital required to be categorized as well 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 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well 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 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 capital divided by risk weighted assets as defined by regulations. + 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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