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Leases (Tables)
12 Months Ended
Dec. 31, 2014
Leases [Abstract]  
Operating Leases of Lessee Disclosure
Minimum payments due in future years under these agreements in effect at December 31, 2014 are as follows:
 
Operating
 
 
 
Leases
 
Royalties
 
(In thousands)
2015
$
25,685

 
$
14,587

2016
19,242

 
18,632

2017
17,065

 
17,932

2018
6,334

 
17,584

2019
3,370

 
13,875

Thereafter
11,880

 
83,282

 
$
83,576

 
$
165,892