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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Line of Credit Facilities [Table Text Block]
Our available lines of credit, outstanding standby LOCs, and performance bonds were as follows:

 
September 30, 2017
 
December 31, 2016
 
(in thousands)
Credit facilities
 
 
 
Multicurrency revolving line of credit
$
500,000

 
$
500,000

Long-term borrowings
(124,523
)
 
(97,167
)
Standby LOCs issued and outstanding
(29,095
)
 
(46,103
)
 
 
 
 
Net available for additional borrowings under the multi-currency revolving line of credit
$
346,382

 
$
356,730

Net available for additional standby LOCs under sub-facility
220,905

 
203,897

 
 
 
 
Unsecured multicurrency revolving lines of credit with various financial institutions
 
 
 
Multicurrency revolving lines of credit
$
110,055

 
$
91,809

Standby LOCs issued and outstanding
(20,859
)
 
(21,734
)
Short-term borrowings
(2,423
)
 
(69
)
Net available for additional borrowings and LOCs
$
86,773

 
$
70,006

 
 
 
 
Unsecured surety bonds in force
$
52,278

 
$
48,221
Schedule of Warranty Accruals [Table Text Block]
A summary of the warranty accrual account activity is as follows:

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
 
(in thousands)
Beginning balance
$
39,810

 
$
45,457

 
$
43,302

 
$
54,512

New product warranties
2,708

 
1,976

 
6,637

 
5,881

Other adjustments and expirations
(4,346
)
 
1,662

 
(2,445
)
 
3,697

Claims activity
(3,773
)
 
(4,485
)
 
(14,372
)
 
(19,488
)
Effect of change in exchange rates
523

 
176

 
1,800

 
184

Ending balance
34,922

 
44,786

 
34,922

 
44,786

Less: current portion of warranty
21,697

 
26,084

 
21,697

 
26,084

Long-term warranty
$
13,225

 
$
18,702

 
$
13,225

 
$
18,702
Warranty Expense [Table Text Block]
Warranty expense was as follows:

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
 
(in thousands)
Total warranty expense
$
(3,148
)
 
$
3,638

 
$
(5,318
)
 
$
9,578
Schedule of Changes to Unearned Revenue for Extended Warranty [Table Text Block]
A summary of changes to unearned revenue for extended warranty contracts is as follows:

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
 
(in thousands)
Beginning balance
$
30,271

 
$
33,068

 
$
31,549

 
$
33,654

Unearned revenue for new extended warranties
302

 
352

 
1,006

 
1,366

Unearned revenue recognized
(1,096
)
 
(905
)
 
(3,163
)
 
(2,640
)
Effect of change in exchange rates
121

 
(31
)
 
206

 
104

Ending balance
29,598

 
32,484

 
29,598

 
32,484

Less: current portion of unearned revenue for extended warranty
4,305

 
4,134

 
4,305

 
4,134

Long-term unearned revenue for extended warranty within other long-term obligations
$
25,293

 
$
28,350

 
$
25,293

 
$
28,350
Health Benefit Plan Costs and Incurred But Not Reported Accrual Balance [Table Text Block]
Plan costs were as follows:

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2017
 
2016
 
2017
 
2016
 
(in thousands)
Plan costs
$
6,096

 
$
6,727

 
$
21,592

 
$
20,360


The IBNR accrual, which is included in wages and benefits payable, was as follows:

 
September 30, 2017
 
December 31, 2016
 
(in thousands)
IBNR accrual
$
2,605

 
$
2,441