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Fair Value Measurements (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jul. 04, 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 |
Assets held in rabbi trusts | 39,008 | $ 40,270
Available for sale securities | 4,697 | 15,432
Fair Value Assets | 43,705 | 55,702
Liabilities: |  |
Embedded derivative | (1,387) | (1,105)
Fair Value Liabilities | (1,387) | (1,105)
Long-term Debt, Fair Value | 726,400 | 853,500
Carrying value of long-term debt, excluding derivative liabilities | 425,907 | 453,817
Derivative, Notional Amount | $ 14,000 |
Derivative, Description of Terms | In the third fiscal quarter of 2014, the Company entered into a forward contract with a highly-rated financial institution to mitigate the foreign currency risk associated with an intercompany loan denominated in a currency other than the legal entity's functional currency. The notional amount of the forward contract was $14,000 as of July 4, 2015. The intercompany loan was used to finance a portion of the purchase price for Capella. The forward contract settles monthly and is expected to be renewed at the Company's discretion on a monthly basis until the intercompany loan is repaid. The forward contract was renewed on the last day of the second fiscal quarter. We have not designated the forward contract as a hedge for accounting purposes, and as such the change in the fair value of the contract is recognized in the consolidated condensed statements of operations as a component of other income (expense). |
Fair Value, Inputs, Level 1 [Member] |  |
Assets: |  |
Assets held in rabbi trusts | $ 25,382 | 26,853
Available for sale securities | 3,965 | 4,439
Fair Value Assets | 29,347 | 31,292
Liabilities: |  |
Fair Value Liabilities | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Assets: |  |
Assets held in rabbi trusts | 13,626 | 13,417
Available for sale securities | 732 | 10,993
Fair Value Assets | 14,358 | 24,410
Liabilities: |  |
Fair Value Liabilities | 0 | 0
Fair Value, Inputs, Level 3 [Member] |  |
Assets: |  |
Assets held in rabbi trusts | 0 | 0
Available for sale securities | 0 | 0
Fair Value Assets | 0 | 0
Liabilities: |  |
Fair Value Liabilities | (1,387) | (1,105)
Convertible Senior Debentures, Due 2040 [Member] |  |
Liabilities: |  |
Embedded derivative | (632) | (526)
Convertible Senior Debentures, Due 2040 [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2040 [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2040 [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Liabilities: |  |
Embedded derivative | (632) | (526)
Convertible Senior Debentures, Due 2041 [Member] |  |
Liabilities: |  |
Embedded derivative | (478) | (341)
Convertible Senior Debentures, Due 2041 [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2041 [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2041 [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Liabilities: |  |
Embedded derivative | (478) | (341)
Convertible Senior Debentures, Due 2042 [Member] |  |
Liabilities: |  |
Embedded derivative | (277) | (238)
Convertible Senior Debentures, Due 2042 [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2042 [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Embedded derivative | 0 | 0
Convertible Senior Debentures, Due 2042 [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Liabilities: |  |
Embedded derivative | $ (277) | $ (238)

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