Debt And Credit Arrangements Summary of Outstanding Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Short-term debt	$ 6,160	$ 4,903
Debt, Long-term and Short-term, Combined Amount	221,794	209,002
Current Maturities Of Long Term Debt Including Short Term Debt	6,160	4,903
Long-term Debt, Excluding Current Maturities	215,634	204,099
Foreign Facilities [Member]
Debt Instrument [Line Items]
Short-term debt	6,160	4,903
Convertible Debt [Member] \| Convertible Notes, Due 2018 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 215,634	$ 204,099

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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