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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2017
Additional information [Abstract]  
Future Minimum Commitments For Capital And Operating Leases
As of December 31, 2017, under current operating and capital lease contracts, we had future minimum lease payments as follows:
(In thousands)
 
Capital
 
Operating
2018
 
$
2,649

 
$
12,074

2019
 
2,697

 
9,692

2020
 
2,662

 
8,808

2021
 
2,710

 
7,764

2022
 
2,643

 
7,416

Thereafter
 
24,179

 
29,586

Total future minimum lease payments
 
$
37,540

 
$
75,340

Less interest portion
 
(15,442
)
 
 
Present value of future minimum lease payments
 
$
22,098