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Retirement Plans (Details 11) (USD $) In Thousands, unless otherwise specified |  |  | 12 Months Ended |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2013 Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2013 U.S. Pension Plans | Dec. 31, 2012 U.S. Pension Plans | Dec. 31, 2011 U.S. Pension Plans | Dec. 31, 2013 U.S. Pension Plans Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2012 U.S. Pension Plans Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2013 U.S. Pension Plans Hedge Funds [Member] | Dec. 31, 2012 U.S. Pension Plans Hedge Funds [Member] | Dec. 31, 2013 U.S. Pension Plans Hedge Funds [Member] Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2012 U.S. Pension Plans Hedge Funds [Member] Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2012 Non-U.S. Pension Plans | Dec. 31, 2013 Non-U.S. Pension Plans | Dec. 31, 2013 Non-U.S. Pension Plans Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2012 Non-U.S. Pension Plans Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2013 Non-U.S. Pension Plans Bank and Insurance Investment Contracts [Member] | Dec. 31, 2012 Non-U.S. Pension Plans Bank and Insurance Investment Contracts [Member] | Dec. 31, 2013 Non-U.S. Pension Plans Bank and Insurance Investment Contracts [Member] Significant Unobservable Inputs (Level 3) [Member] | Dec. 31, 2012 Non-U.S. Pension Plans Bank and Insurance Investment Contracts [Member] Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of defined benefit plan assets, beginning balance | $ 175,952 | $ 147,788 | $ 35,963 | $ 13,057 | $ 128,516 | $ 106,572 | $ 91,610 | $ 7,025 | $ 6,266 | $ 7,025 | [1] | $ 6,266 | [1] | $ 6,266 | [1] | $ 6,018 |  | $ 12,798 | $ 40,820 | $ 34,420 | $ 29,697 | $ 34,420 | [2] | $ 29,697 | [2] | $ 29,697 | [2] | $ 7,039 |
Net purchases (sales) and appreciation (depreciation) of defined benefit plan assets |  |  | 5,482 | 4,524 |  |  |  |  |  |  |  |  |  | 759 |  | 248 |  |  |  |  |  |  |  |  |  | 4,723 |  | 4,276 |
Other plans' impact on fair value of defined benefit plan assets |  |  |  | 18,382 |  |  |  |  |  |  |  |  |  |  |  |  |  | 18,382 |  |  |  |  |  |  |  |  |  | 18,382 |
Fair value of defined benefit plan assets, ending balance | $ 175,952 | $ 147,788 | $ 41,445 | $ 35,963 | $ 128,516 | $ 106,572 | $ 91,610 | $ 7,025 | $ 6,266 | $ 7,025 | [1] | $ 6,266 | [1] | $ 7,025 | [1] | $ 6,266 | [1] | $ 35,859 | $ 40,820 | $ 34,420 | $ 29,697 | $ 34,420 | [2] | $ 29,697 | [2] | $ 34,420 | [2] | $ 29,697 | [2]
[1] | Hedge fund invests in both short and long term U.S. common stocks. Management of the hedge funds has the ability to shift investments from value to growth strategies, from large to small capitalization stocks and from a net long position to a net short position.
[2] | Amount represents bank and insurance guaranteed investment contracts.

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + 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=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930 + Details
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- Definition The amount of increase or decrease in the fair value of plan assets during the reporting period. + 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=28361610&loc=d3e1928-114920 + Details
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- Definition Changes in the fair value of defined benefit plan assets, not otherwise separately disclosed in the financial statements. + References No definition available. + Details
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