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Basis of Presentation and Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2018
Accounting Policies [Abstract]  
Components of Accumulated Other Comprehensive Income
The components of Accumulated other comprehensive income included in Stockholders' Equity are as follows:
 
 
March 31,
2018
 
December 31,
2017
 
 
(In thousands)
Currency translation adjustments
 
$
10,024

 
$
13,148

Net unrealized gain on derivative financial instruments
 
447

 
353

Unrecognized prior service cost on benefit obligations
 
(5,915
)
 
(6,237
)
Net unrealized gain (loss) on available-for-sale investments
 
(121
)
 
2,190

Accumulated other comprehensive income
 
$
4,435

 
$
9,454
Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income
The amounts reclassified out of Accumulated other comprehensive income by component and the affected condensed consolidated statements of income line items are as follows:
 
 
Three Months Ended
March 31,
 
 
 
 
2018
 
2017
 
 
Accumulated Other Comprehensive Income (Loss) Component Recognized
 
(In thousands)
 
Line Item Presented
Realized gain (loss) on derivative financial instruments
 
$
(11
)
 
$
(4
)
 
Revenues
 
 
120

 
54

 
Cost of operations
 
 
109

 
50

 
Total before tax
 
 
(30
)
 
(13
)
 
Provision for Income Taxes
 
 
$
79

 
$
37

 
Net Income
Amortization of prior service cost on benefit obligations
 
$
(505
)
 
$
(446
)
 
Other – net
 
 
183

 
156

 
Provision for Income Taxes
 
 
$
(322
)
 
$
(290
)
 
Net Income
Realized gain on investments
 
$
—

 
$
22

 
Other – net
 
 
—

 
(8
)
 
Provision for Income Taxes
 
 
$
—

 
$
14

 
Net Income
Total reclassification for the period
 
$
(243
)
 
$
(239
)
 
 
Restricted Cash and Cash Equivalents
The following table provides a reconciliation of cash and cash equivalents and restricted cash and cash equivalents within our condensed consolidated balance sheets to the totals presented in our condensed consolidated statement of cash flows:
 
 
March 31,
2018
 
December 31,
2017
 
 
(In thousands)
Cash and cash equivalents
 
$
143,335

 
$
203,404

Restricted cash and cash equivalents
 
5,362

 
7,105

Restricted cash and cash equivalents included in Other Assets
 
2,639

 
2,635

Total cash and cash equivalents and restricted cash and cash equivalents as presented in our condensed consolidated statement of cash flows
 
$
151,336

 
$
213,144
Restricted Cash and Cash Equivalents
The following table provides a reconciliation of cash and cash equivalents and restricted cash and cash equivalents within our condensed consolidated balance sheets to the totals presented in our condensed consolidated statement of cash flows:
 
 
March 31,
2018
 
December 31,
2017
 
 
(In thousands)
Cash and cash equivalents
 
$
143,335

 
$
203,404

Restricted cash and cash equivalents
 
5,362

 
7,105

Restricted cash and cash equivalents included in Other Assets
 
2,639

 
2,635

Total cash and cash equivalents and restricted cash and cash equivalents as presented in our condensed consolidated statement of cash flows
 
$
151,336

 
$
213,144
Summary of Changes in Carrying Amount of Accrued Warranty Expense
The following summarizes the changes in the carrying amount of our Accrued warranty expense:
 
 
Three Months Ended
March 31,
 
 
2018
 
2017
 
 
(In thousands)
Balance at beginning of period
 
$
13,428

 
$
11,477

Additions
 
517

 
386

Expirations and other changes
 
(53
)
 
—

Payments
 
(20
)
 
(15
)
Translation
 
(173
)
 
60

Balance at end of period
 
$
13,699

 
$
11,908