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Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  
Financial Instruments Measured at Fair Value

Financial instruments, measured at fair value, by level within the fair value hierarchy were as follows:

 

 

 

Carrying

 

 

Fair Value

 

(In thousands)

 

Value

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

September 30, 2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Long-term debt

 

$

843,432

 

 

$

 

 

$

859,303

 

 

$

 

December 31, 2017

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Long-term debt

 

$

909,617

 

 

$

 

 

$

950,522

 

 

$