Construction Services Redeemable Noncontrolling Interest (Tables)

6 Months Ended

Jun. 30, 2016

Noncontrolling Interest [Abstract]

Summary of Redeemable Noncontrolling Interest

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

	Redeemable Noncontrolling Interest
(Thousands of dollars):
Balance, December 31, 2015	$	16,108
Net income (loss) attributable to redeemable noncontrolling interest		157
Foreign currency exchange translation adjustment		29
Centuri distribution to redeemable noncontrolling interest		(99	)
Adjustment to redemption value		(653	)
Balance, June 30, 2016	$	15,542