Comprehensive income (loss)

3 Months Ended

Mar. 31, 2015

Comprehensive income (loss) [Abstract]

Comprehensive income (loss)

Comprehensive income (loss)

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

Three Months Ended March 31, 2015	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	$	(3,071	)	$	(38,218	)	$	(829	)	$	15		$	(42,103	)
Other comprehensive loss before reclassifications	—			—			(112		)	(21		)	(133		)
Amounts reclassified from accumulated other comprehensive loss	99			375			802			36			1,312
Net current-period other comprehensive income	99			375			690			15			1,179
Balance at end of period	$	(2,972	)	$	(37,843	)	$	(139	)	$	30		$	(40,924	)

Three Months Ended March 31, 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	—			—			46			(36		)	10
Amounts reclassified from accumulated other comprehensive loss	344			275			—			38			657
Net current-period other comprehensive income	344			275			46			2			667
Balance at end of period	$	(3,421	)	$	(33,532	)	$	(621	)	$	36		$	(37,538	)

Reclassifications out of accumulated other comprehensive loss were as follows:

	Three Months Ended						Location on Consolidated Statements of Income
	March 31, 2015			March 31, 2014
	(In thousands)
Reclassification adjustment for loss on derivative instruments included in net income (loss):
Commodity derivative instruments	$	—		$	(388	)	Operating revenues
Interest rate derivative instruments	(159		)	(160		)	Interest expense
	(159		)	(548		)
	60			204			Income taxes
	(99		)	(344		)
Amortization of postretirement liability losses included in net periodic benefit cost	(605		)	(443		)	(a)
	230			168			Income taxes
	(375		)	(275		)
Reclassification adjustment for loss on foreign currency translation adjustment included in net income (loss)	(1,292		)	—			Other income
	490			—			Income taxes
	(802		)	—
Reclassification adjustment for loss on available-for-sale investments included in net income (loss)	(55		)	(58		)	Other income
	19			20			Income taxes
	(36		)	(38		)
Total reclassifications	$	(1,312	)	$	(657	)

(a) Included in net periodic benefit cost (credit). For more information, see Note 16.