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Fair Value Measurements (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Oct. 03, 2015 | Dec. 31, 2014
Assets: |  |
Held-to-maturity Securities, Transferred Security, at Carrying Value | $ 0 |
Held-to-maturity Securities, Unrecognized Holding Gain | 0 |
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities | 0 |
Liabilities: |  |
Embedded derivative | (1,782) | $ (1,105)
Long-term Debt, Fair Value | 665,000 | 853,500
Carrying value of long-term debt, excluding derivative liabilities | 429,984 | 453,817
Derivative, Notional Amount | $ 29,000 |
Derivative, Description of Terms | The Company enters into forward contracts with a highly-rated financial institution to mitigate the foreign currency risk associated with intercompany loans denominated in a currency other than the legal entity's functional currency. The notional amount of the forward contracts were $29,000 as of October 3, 2015. The forward contracts settle monthly and are expected to be renewed at the Company's discretion on a monthly basis until the intercompany loans are repaid. The forward contracts were renewed on the last day of the third fiscal quarter. We have not designated the forward contracts as hedges for accounting purposes, and as such the change in the fair value of the contracts are recognized in the consolidated condensed statements of operations as a component of other income (expense). |
Capella [Member] |  |
Assets: |  |
Long-lived assets held and used, carrying value | $ 68,500 |
Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Assets held in rabbi trusts | 38,623 | 40,270
Available for sale securities | 3,971 | 15,432
Fair Value Assets | 42,594 | 55,702
Liabilities: |  |
Fair Value Liabilities | (1,782) | (1,105)
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Assets held in rabbi trusts | 25,064 | 26,853
Available for sale securities | 3,971 | 4,439
Fair Value Assets | 29,035 | 31,292
Liabilities: |  |
Fair Value Liabilities | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Assets held in rabbi trusts | 13,559 | 13,417
Available for sale securities | 0 | 10,993
Fair Value Assets | 13,559 | 24,410
Liabilities: |  |
Fair Value Liabilities | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Assets held in rabbi trusts | 0 | 0
Available for sale securities | 0 | 0
Fair Value Assets | 0 | 0
Liabilities: |  |
Fair Value Liabilities | (1,782) | (1,105)
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Capella [Member] |  |
Assets: |  |
Long-lived assets held and used, Fair value disclosure | 10,900 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member] | Capacitors Segment [Member] |  |
Assets: |  |
Goodwill, Fair Value Disclosure | 0 |
Convertible Senior Debentures, Due 2040 [Member] |  |
Liabilities: |  |
Embedded derivative | (830) | (526)
Convertible Senior Debentures, Due 2040 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | (830) | (526)
Convertible Senior Debentures, Due 2040 [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2040 [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2040 [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | (830) | (526)
Convertible Senior Debentures, Due 2041 [Member] |  |
Liabilities: |  |
Embedded derivative | (570) | (341)
Convertible Senior Debentures, Due 2041 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | (570) | (341)
Convertible Senior Debentures, Due 2041 [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2041 [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2041 [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | (570) | (341)
Convertible Senior Debentures, Due 2042 [Member] |  |
Liabilities: |  |
Embedded derivative | (382) | (238)
Convertible Senior Debentures, Due 2042 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | (382) | (238)
Convertible Senior Debentures, Due 2042 [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2042 [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2042 [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] |  |
Liabilities: |  |
Embedded derivative | $ (382) | $ (238)

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