Accumulated Other Comprehensive Income

9 Months Ended

Sep. 30, 2018

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income

Accumulated Other Comprehensive Income

The following items are included in accumulated other comprehensive income ("AOCI"):

				Pension,
				Postretirement
				and Other						Accumulated
				Post-						Other
	Derivative			Employment			Available-for-			Comprehensive
	Instruments			Benefits			Sale Securities			Income
	(In thousands)
Balance at December 31, 2017	$	647		$	19,720		$	—		$	20,367
Unrealized gains (losses)	(9,743		)	8,373			(355		)	(1,725		)
Amounts reclassified from AOCI	4,071			(1,984		)	(24		)	2,063
Balance at September 30, 2018	$	(5,025	)	$	26,109		$	(379	)	$	20,705

The following amounts were reclassified out of AOCI:

	Three Months Ended September 30,						Nine Months Ended September 30,
Details About AOCI Components	2018			2017			2018			2017			Line Item in the Condensed Consolidated Statement of Operations
(In thousands)
Coal hedges	$	(4,824	)	$	(88	)	$	(4,824	)	$	(88	)	Revenues
Interest rate hedges	265			—			753			—			Interest expense
	$	(4,559	)	$	(88	)	$	(4,071	)	$	(88	)	Net of tax
Pension, postretirement and other post-employment benefits
Pension settlement	613			228			1,984			715			Non-service related pension and postretirement benefit (costs) credits
Actuarial curtailments	—			(773		)	—			(773		)
Sale of Cumberland River Pension Plan	—			(360		)	—			(360		)
	$	613		$	(905	)	$	1,984		$	(418	)	Net of tax
Available-for-sale securities	$	8		$	—		$	24		$	332		Interest and investment income
	$	8		$	—		$	24		$	332		Net of tax