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Contract Assets, Contract Costs and Contract Liabilities (Tables)
 12 Months Ended
Dec. 31, 2018
Contract Assets, Contract Costs and Contract Liabilities [Abstract]  
Contract with Customer, Asset and Liability [Table Text Block]
Activity related to contract assets, contract costs and contract liabilities is as follows:
 
 
December 31,
2018
 
January 1, 2018(1)
 
$ Change
 
% Change
In thousands
 
 
 
 
 
 
 
 
Contract assets(2)
 
$
108,861

 
$
82,699

 
$
26,162

 
31.6
%
 
 
 
 
 
 
 
 
 
Contract costs, current portion
 
$
5,993

 
$
3,022

 
$
2,971

 
98.3
%
Contract costs, noncurrent portion
 
$
10,666

 
$
7,852

 
$
2,814

 
35.8
%
 
 
 
 
 
 
 
 
 
Contract liabilities, current portion
 
$
28,865

 
$
10,705

 
$
18,160

 
169.6
%
Contract liabilities, noncurrent portion
 
$
78,562

 
$
689

 
$
77,873

 
11,302.3
%
(1) These amounts include the impact of the cumulative effect adjustment resulting from the adoption of ASC 606.
Contract Assets Due to Contract Changes, Negotiated Settlements and Claims for Unanticipated Costs [Table Text Block]
Contract assets includes amounts for matters such as contract changes, negotiated settlements and claims for unanticipated contract costs. These amounts are as follows:
 
 
December 31,
2018
 
December 31,
2017
In thousands
 
 
 
 
Contract changes, negotiated settlements and claims for unanticipated contract costs
 
$
2,909

 
$
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