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Construction Services Redeemable Noncontrolling Interest (Tables)
 9 Months Ended
Sep. 30, 2015
Noncontrolling Interest [Abstract]  
Summary of Redeemable Noncontrolling Interest

The following depicts impacts to the balance of the redeemable noncontrolling interest between the indicated periods.

 

     Redeemable
Noncontrolling
Interest		  
(Thousands of dollars):       

Balance, December 31, 2014

    $ 20,042   

Net income attributable to redeemable noncontrolling interest

      454   

Foreign currency exchange translation adjustment

      (55 ) 

Adjustment to redemption value

      (6,738 ) 
  

 

 

  

Balance, September 30, 2015

    $ 13,703