Financial Commitments (Long-Term Debt) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total debt	$ 793,099	$ 817,684
Less - current maturities	(108,897)	(88,917)
Long-term debt, net	684,202	728,767
Term Loan [Member]
Debt Instrument [Line Items]
Total debt	77,054	222,120
2010 Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	297,867	297,118
Convertible Notes [Member]
Debt Instrument [Line Items]
Total debt	150,542
Equipment Financing, Mortgages And Acquisition-Related Notes [Member]
Debt Instrument [Line Items]
Total debt	107,930	133,288
Other Indebtedness [Member]
Debt Instrument [Line Items]
Total debt	4,363	9,343
2014 Revolver [Member]
Debt Instrument [Line Items]
Total debt	$ 155,343	$ 155,815

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: 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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
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+ References

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-Section S99
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