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Debt (Tables)
 12 Months Ended
Dec. 31, 2013
Debt Disclosure [Abstract]  
Debt
Debt consists of the following:
 
2013
 
2012
December 31,
Carrying
Amount
 
Estimated
Fair Value
 
Carrying
Amount
 
Estimated
Fair Value
6.35% Senior Notes, $ 200 million par value, maturing April 2016
$
204,028

 
$
218,750

 
$
205,754

 
$
219,500

Capital leases
12,215

 
12,215

 
11,837

 
11,837

Total debt
216,243

 
230,965

 
217,591

 
231,337

Less current maturities
(2,428
)
 
(2,428
)
 
(2,208
)
 
(2,208
)
Long-term debt
$
213,815

 
$
228,537

 
$
215,383

 
$
229,129