v3.3.1.900
Long Term Debt (Tables)
 12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Components of Long-term Debt

The components of long-term debt as of December 31 are as follows:

 

     2015      2014  
     (Thousands of dollars)  

Senior Notes issued March 17, 2014, interest only payable semi-annually at 5.25%, maturing March 15, 2019

    $ 500,000       $ 500,000   

Revolving Credit Facility due October 1, 2017 with a group of commercial banks, interest payable at variable rates

      57,500         43,000   
  

 

 

     

 

 

  

Total long-term debt

    $ 557,500       $ 543,000   
  

 

 

     

 

 

  
Summary of Annual Maturities of Long-term Debt

Listed below is information on our future annual maturities of long-term debt (in thousands):

 

2016

    $ —     

2017

      57,500   

2018

      —     

2019

      500,000   

2020

      —     

Thereafter

      —     
  

 

 

  

Total

    $ 557,500