ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Notes)

6 Months Ended

Jun. 30, 2018

Accumulated Other Comprehensive Income (Loss) [Line Items]

Comprehensive Income (Loss) Note [Text Block]


7.	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following table sets forth the effect of reclassifications from accumulated other comprehensive income (loss) in our Consolidated Statements of Income for the periods indicated:



	Three Months Ended						Six Months Ended						Affected Line Item in the
Details about Accumulated Other	June 30,						June 30,						Consolidated Statements
Comprehensive Income (Loss) Components	2018			2017			2018			2017			of Income
	(Thousands of dollars)
Pension and other postemployment benefit plan obligations (a)
Amortization of net loss	$	10,950		$	10,648		$	21,900		$	21,296
Amortization of unrecognized prior service cost	(1,142		)	(1,149		)	(2,284		)	(2,298		)
	9,808			9,499			19,616			18,998
Regulatory adjustments (b)	(9,537		)	(9,289		)	(19,074		)	(18,579		)
	271			210			542			419			Income before income taxes
	(68		)	(81		)	(419		)	(161		)	Income tax expense
Total reclassifications for the period	$	203		$	129		$	123		$	258		Net income

(a) These components of accumulated other comprehensive income (loss) are included in the computation of net periodic benefit cost. See Note 9 for additional detail of our net periodic benefit cost.

(b) Regulatory adjustments represent pension and other postemployment benefit costs expected to be recovered through rates and are deferred as part of our regulatory assets. See Note 3 for additional disclosures of regulatory assets and liabilities.