XML 59 R46.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 6 - Accrued Retirement Benefits - Fair Values of Pension Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Fair value of pension plan assets | $ 48,442 | $ 47,176 | $ 56,434
Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of pension plan assets |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of pension plan assets | 48,442 | 47,176 |
Equity Funds [Member] |  |  |
Fair value of pension plan assets | 14,772 | 7,177 |
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of pension plan assets |  |  |
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of pension plan assets | 14,772 | 7,177 |
Fixed Income Funds [Member] |  |  |
Fair value of pension plan assets | 32,581 | 39,025 |
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of pension plan assets |  |  |
Fixed Income Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of pension plan assets | 32,581 | 39,025 |
Money Market Funds [Member] |  |  |
Fair value of pension plan assets | 1,089 | 974 |
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value of pension plan assets |  |  |
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value of pension plan assets | $ 1,089 | $ 974 |

X
- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + 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 (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |