Construction Services Redeemable Noncontrolling Interest (Tables)

3 Months Ended

Mar. 31, 2017

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, 2016	$	22,590
Net income (loss) attributable to redeemable noncontrolling interest		(258	)
Foreign currency exchange translation adjustment		7
Centuri dividend to redeemable noncontrolling interest		(102	)
Adjustment to redemption value		1,288
Balance, March 31, 2017	$	23,525