Derivative Instruments (Tables)

6 Months Ended

Jun. 30, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments Classified as Assets (Liabilities)

The following tables present the fair values of the Company's derivative instruments on a gross basis as reflected on the Company’s consolidated balance sheets (in thousands):

	June 30, 2017
	Derivative Assets				Derivative Liabilities (1)
	Current		Long-Term		Current		Long-Term
Fair Value of Designated Derivatives
Interest rate swaps	$	—	$	—	$	7,540	$	20,140
Fair Value of Undesignated Derivatives
Interest rate swaps	$	—	$	842	$	2,519	$	3,622
Energy derivative	18,680		15,216		—		—
Foreign currency forward contracts	—		—		1,281		409
Total Fair Value	$	18,680	$	16,058	$	11,340	$	24,171
	December 31, 2016
	Derivative Assets				Derivative Liabilities
	Current		Long-Term		Current		Long-Term
Fair Value of Designated Derivatives
Interest rate swaps	$	—	$	40	$	8,289	$	21,058
Fair Value of Undesignated Derivatives
Interest rate swaps	$	—	$	1,788	$	3,238	$	3,463
Energy derivative	16,209		24,707		—		—
Foreign currency forward contracts	1,369		177		391		—
Total Fair Value	$	17,578	$	26,712	$	11,918	$	24,521

Schedule of Notional Amounts of Outstanding Derivative Positions

The following table summarizes the notional amounts of the Company's outstanding derivative instruments (in thousands except for MWh):

	Unit of Measure	June 30,		December 31,
		2017		2016
Designated Derivative Instruments
Interest rate swaps (1)	USD	$	433,849	$	365,443
Interest rate swaps	CAD	$	195,975	$	196,425
Undesignated Derivative Instruments
Interest rate swaps	USD	$	250,488	$	257,389
Energy derivative	MWh	911,048		1,201,691
Foreign currency forward contracts	CAD	$	142,750	$	95,800

Derivative Instruments, Gain (Loss)

The following table presents the pre-tax effect of the derivative instruments designated as cash flow recognized in accumulated other comprehensive loss, as well as amounts reclassified to earnings for the following periods (in thousands):

		Three months ended June 30,						Six months ended June 30,
	Description	2017			2016			2017			2016
Losses recognized in accumulated OCI	Effective portion of change in fair value	$	(3,778	)	$	(11,343	)	$	(4,359	)	$	(34,763	)
Losses reclassified from accumulated OCI into:
Interest expense	Derivative settlements	$	(2,400	)	$	(3,002	)	$	(4,970	)	$	(6,206	)
Interest expense	Ineffective portion	$	88		$	(423	)	$	77		$	(512	)

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location

The following table presents gains and losses on derivatives not designated as hedges (in thousands):

	Financial Statement Line Item		Three months ended June 30,						Six months ended June 30,
Derivative Type		Description	2017			2016			2017			2016
Interest rate derivatives	Loss on undesignated derivatives, net	Change in fair value, net of settlements	$	(1,477	)	$	(3,937	)	$	(387	)	$	(12,818	)
Interest rate derivatives	Loss on undesignated derivatives, net	Derivative settlements	$	(864	)	$	(1,280	)	$	(1,833	)	$	(2,606	)
Energy derivative	Electricity sales	Change in fair value, net of settlements	$	(4,663	)	$	(9,327	)	$	(7,021	)	$	(14,152	)
Energy derivative	Electricity sales	Derivative settlements	$	5,067		$	6,752		$	11,082		$	13,485
Foreign currency forward contracts	Loss on undesignated derivatives, net	Change in fair value, net of settlements	$	(1,752	)	$	(654	)	$	(2,845	)	$	(4,615	)
Foreign currency forward contracts	Loss on undesignated derivatives, net	Derivative settlements	$	(658	)	$	(8	)	$	(334	)	$	529