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Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2013
Fair Value Disclosures [Abstract]  
Fair Value of Long-Term Debt
 
 
September 30, 2013
 
December 31, 2012
 
 
Recorded
Amount
 
Fair Value
 
Recorded
Amount
 
Fair Value
 
 
(In thousands)
Long-term debt
 
$
1,079,884

 
$
1,111,458

 
$
699,288

 
$
764,784