Comprehensive income (loss) (Tables)

6 Months Ended

Jun. 30, 2014

Comprehensive income (loss) [Abstract]

Comprehensive income (loss)

The after-tax changes in the components of accumulated other comprehensive loss were as follows:

Three Months Ended June 30, 2014	Net Unrealized Gain (Loss) on Derivative  Instruments  Qualifying as Hedges			Postretirement  Liability Adjustment			Foreign Currency Translation Adjustment			Net Unrealized Gain (Loss) on Available-for-sale Investments		Total Accumulated  Other Comprehensive  Loss
	(In thousands)
Balance at beginning of period	$	(3,421	)	$	(33,532	)	$	(621	)	$	36	$	(37,538	)
Other comprehensive income (loss) before reclassifications	—			—			42			8		50
Amounts reclassified from accumulated other comprehensive loss	13			245			—			32		290
Net current-period other comprehensive income	13			245			42			40		340
Balance at end of period	$	(3,408	)	$	(33,287	)	$	(579	)	$	76	$	(37,198	)

Three Months Ended June 30, 2013	Net Unrealized Gain (Loss) on Derivative  Instruments  Qualifying as Hedges			Postretirement  Liability Adjustment			Foreign Currency Translation Adjustment			Net Unrealized Gain (Loss) on Available-for-sale Investments			Total Accumulated  Other Comprehensive  Loss
	(In thousands)
Balance at beginning of period	$	(2,603	)	$	(53,699	)	$	(423	)	$	110		$	(56,615	)
Other comprehensive income (loss) before reclassifications	254			—			(390		)	(142		)	(278		)
Amounts reclassified from accumulated other comprehensive loss	(395		)	424			—			43			72
Net current-period other comprehensive income (loss)	(141		)	424			(390		)	(99		)	(206		)
Balance at end of period	$	(2,744	)	$	(53,275	)	$	(813	)	$	11		$	(56,821	)

Six Months Ended June 30, 2014	Net Unrealized Gain (Loss) on Derivative  Instruments  Qualifying as Hedges			Postretirement  Liability Adjustment			Foreign Currency Translation Adjustment			Net Unrealized Gain (Loss) on Available-for-sale Investments		Total Accumulated  Other Comprehensive  Loss
	(In thousands)
Balance at beginning of period	$	(3,765	)	$	(33,807	)	$	(667	)	$	34	$	(38,205	)
Other comprehensive income (loss) before reclassifications	—			—			88			10		98
Amounts reclassified from accumulated other comprehensive loss	357			520			—			32		909
Net current-period other comprehensive income	357			520			88			42		1,007
Balance at end of period	$	(3,408	)	$	(33,287	)	$	(579	)	$	76	$	(37,198	)

Six Months Ended June 30, 2013	Net Unrealized Gain (Loss) on Derivative  Instruments  Qualifying as Hedges			Postretirement  Liability Adjustment			Foreign Currency Translation Adjustment			Net Unrealized Gain (Loss) on Available-for-sale Investments			Total Accumulated  Other Comprehensive  Loss
	(In thousands)
Balance at beginning of period	$	6,018		$	(54,347	)	$	(511	)	$	119		$	(48,721	)
Other comprehensive income (loss) before reclassifications	(5,594		)	—			(302		)	(187		)	(6,083		)
Amounts reclassified from accumulated other comprehensive loss	(3,168		)	1,072			—			79			(2,017		)
Net current-period other comprehensive income (loss)	(8,762		)	1,072			(302		)	(108		)	(8,100		)
Balance at end of period	$	(2,744	)	$	(53,275	)	$	(813	)	$	11		$	(56,821	)

Reclassification out of accumulated other comprehensive income

Reclassifications out of accumulated other comprehensive loss were as follows:

	Three Months Ended						Six Months Ended						Location on Consolidated Statements of Income
	June 30,						June 30,
	2014			2013			2014			2013
	(In thousands)
Reclassification adjustment for gain (loss) on derivative instruments included in net income:
Commodity derivative instruments	$	137		$	1,381		$	(250	)	$	5,896		Operating revenues
Interest rate derivative instruments	(160		)	(664		)	(320		)	(780		)	Interest expense
	(23		)	717			(570		)	5,116
	10			(322		)	213			(1,948		)	Income taxes
	(13		)	395			(357		)	3,168
Amortization of postretirement liability losses included in net periodic benefit cost	(395		)	(967		)	(838		)	(1,934		)	(a)
	150			543			318			862			Income taxes
	(245		)	(424		)	(520		)	(1,072		)
Reclassification adjustment for loss on available-for-sale investments included in net income	(49		)	(66		)	(49		)	(121		)	Other income
	17			23			17			42			Income taxes
	(32		)	(43		)	(32		)	(79		)
Total reclassifications	$	(290	)	$	(72	)	$	(909	)	$	2,017

(a) Included in net periodic benefit cost (credit). For more information, see Note 19.