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13. Employee Benefits (Details - Asset Allocation) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Weighted Average Asset Allocation at Year-End | 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations | 100.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations
Cash And Cash Equivalents [Member] |  |
Weighted Average Asset Allocation at Year-End | 1.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_CashAndCashEquivalentsMember | 0.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_InvestmentTypeAxis = us-gaap_CashAndCashEquivalentsMember
Equity Securities [Member] |  |
Weighted Average Asset Allocation at Year-End | 84.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember | 87.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_EquitySecuritiesMember
Debt Securities [Member] |  |
Weighted Average Asset Allocation at Year-End | 15.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_DebtSecuritiesMember | 13.00%us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_DebtSecuritiesMember

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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920 + Details
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