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Debt and Credit Arrangements (Tables)
 9 Months Ended
Sep. 30, 2017
Debt Disclosure [Abstract]  
Schedule of Debt [Table Text Block]
The following table represents the components of the Company’s borrowings:
 
September 30,
2017
 
December 31,
2016
Convertible notes, due August 2018, effective interest rate of 7.9%
$
238,142

 
$
228,115

Senior secured revolving credit facility, due October 2019, effective interest rate of 4.0%
300,000

 
—

Foreign facilities
10,792

 
13,208

Total debt
548,934

 
241,323

Unamortized debt issuance costs
(592
)
 
(1,125
)
Total debt, net of unamortized debt issuance costs
548,342

 
240,198

Less: current maturities (1)
(244,330
)
 
(6,487
)
Long-term debt
$
304,012

 
$
233,711

_______________
(1)Current maturities includes $238,142 current convertible notes at September 30, 2017.