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Comprehensive Income Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
(in thousands)
Currency translation gain (loss)
 
Net unrealized gain (loss) on investments (net of tax)
 
Net unrealized gain (loss) on derivative instruments
 
Net unrecognized gain (loss) related to benefit plans (net of tax)
 
Total
Balance at December 31, 2013
$
38,446

 
$
(20
)
 
$
627

 
$
(3,677
)
 
$
35,376

Other comprehensive income (loss) before reclassifications
(26,895
)
 
(2
)
 
(2,360
)
 
3,956

 
(25,301
)
Amounts reclassified from AOCI to net income (loss)
—

 
—

 
1,610

 
(1,311
)
 
299

Net current-period other comprehensive income
(26,895
)
 
(2
)
 
(750
)
 
2,645

 
(25,002
)
Balance at December 31, 2014
11,551

 
(22
)
 
(123
)
 
(1,032
)
 
10,374

Other comprehensive income (loss) before reclassifications
(19,459
)
 
(49
)
 
339

 
519

 
(18,650
)
Amounts reclassified from AOCI to net income (loss)
—

 
27

 
1,133

 
(195
)
 
965

Net transfers from parent
(11,585
)
 
—

 
437

 
(394
)
 
(11,542
)
Net current-period other comprehensive income (loss)
(31,044
)
 
(22
)
 
1,909

 
(70
)
 
(29,227
)
Balance at December 31, 2015
(19,493
)
 
(44
)
 
1,786

 
(1,102
)
 
(18,853
)
Other comprehensive income (loss) before reclassifications
(24,494
)
 
7

 
2,046

 
7,692

 
(14,749
)
Amounts reclassified from AOCI to net income (loss)
—

 
—

 
(3,030
)
 
150

 
(2,880
)
Net current-period other comprehensive income (loss)
(24,494
)
 
7

 
(984
)
 
7,842

 
(17,629
)
Balance at December 31, 2016
$
(43,987
)
 
$
(37
)
 
$
802

 
$
6,740

 
$
(36,482
)


The amounts reclassified out of AOCI by component and the affected consolidated and combined statements of operations line items are as follows (in thousands):
AOCI Component
 
Line Items in the Consolidated and Combined Statements of Operations
Affected by Reclassifications
from AOCI
 
 
 
 
Year Ended December 31,
 
 
2016
 
2015
 
2014
Derivative financial instruments
 
Revenues
 
$
4,624

 
$
546

 
$
(53
)
 
 
Cost of operations
 
195

 
155

 
13

 
 
Other-net
 
(1,221
)
 
(24
)
 
(6
)
 
 
Total before tax
 
3,598

 
677

 
(46
)
 
 
Provision for income taxes
 
568

 
149

 
(11
)
 
 
Net income (loss)
 
$
3,030

 
$
528

 
$
(35
)
 
 
 
 
 
 
 
 
 
Amortization of prior service cost on benefit obligations
 
Cost of operations
 
$
254

 
$
(1,475
)
 
$
(457
)
 
 
Provision for income taxes
 
404

 
(1,168
)
 
(183
)
 
 
Net income (loss)
 
$
(150
)
 
$
(307
)
 
$
(274
)
 
 
 
 
 
 
 
 
 
Realized gain on investments
 
Other-net
 
$
—

 
$
(42
)
 
$
—

 
 
Provision for income taxes
 
—

 
(15
)
 
—

 
 
Net income (loss)
 
$
—

 
$
(27
)
 
$
—