Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2017
Fair Value Disclosures [Abstract]  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
 
 
Three months ended September 30,
 
Nine months ended September 30,
Contingent Consideration Liability
 
2017
 
2016
 
2017
 
2016
Balances, beginning of period
 
$
21,502

 
N/A
 
$

 
N/A
Purchase
 

 
N/A
 
21,284

 
N/A
Total loss included in other income, net
 
3

 
N/A
 
221

 
N/A
Settlement
 

 
N/A
 

 
N/A
Balances, end of period
 
$
21,505

 
N/A
 
$
21,505

 
N/A
Financial Assets and Liabilities Required Fair Value Measurement on Recurring Basis
The Company’s financial assets and liabilities which require fair value measurement on a recurring basis are classified within the fair value hierarchy as follows (in thousands):
 
September 30, 2017
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
Interest rate swaps
$

 
$
2,907

 
$

 
$
2,907

Energy derivative

 

 
30,782

 
30,782

 
$

 
$
2,907

 
$
30,782

 
$
33,689

Liabilities
 
 
 
 
 
 
 
Interest rate swaps
$

 
$
29,479

 
$

 
$
29,479

Foreign currency forward contracts

 
4,595

 

 
4,595

Contingent consideration

 

 
21,505

 
21,505

 
$


$
34,074


$
21,505

 
$
55,579

 
December 31, 2016
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets
 
 
 
 
 
 
 
Interest rate swaps
$

 
$
1,828

 
$

 
$
1,828

Energy derivative

 

 
40,916

 
40,916

Foreign currency forward contracts

 
1,546

 

 
1,546

 
$

 
$
3,374

 
$
40,916

 
$
44,290

Liabilities
 
 
 
 
 
 
 
Interest rate swaps
$

 
$
36,048

 
$

 
$
36,048

Foreign currency forward contracts

 
391

 

 
391

 
$

 
$
36,439

 
$

 
$
36,439

Fair Value Measurements, Recurring Level 3, Valuation Techniques
The valuation techniques and significant unobservable inputs used in recurring Level 3 fair value measurements were as follows (in thousands, for fair value):
September 30, 2017
 
Fair Value
 
Valuation Technique
 
Significant Unobservable Inputs
 
Range
Energy derivative
 
$30,782
 
Discounted cash flow
 
Forward electricity prices
 
$14.72 - $67.91(1)
 
 
 
 
 
 
Discount rate
 
1.33% - 1.67%
 
 
 
 
 
 
 
 
 
Contingent consideration
 
$21,505
 
Discounted cash flow
 
Discount rate
 
4.0% - 8.0%
 
 
 
 
 
 
Annual energy production loss
 
1%
 
 
 
 
 
 
 
 
 
December 31, 2016
 
Fair Value
 
Valuation Technique
 
Significant Unobservable Inputs
 
Range
Energy derivative
 
$40,916
 
Discounted cash flow
 
Forward electricity prices
 
$15.83 - $81.76(1)
 
 
 
 
 
 
Discount rate
 
1.00% - 1.52%
(1) 
Represents price per MWh
Reconciliation of Energy Derivative Contract Measured at Fair Value
The following tables present a reconciliation of the energy derivative contract and contingent consideration liability measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
 
 
Three months ended September 30,
 
Nine months ended September 30,
Energy Derivative
 
2017
 
2016
 
2017
 
2016
Balances, beginning of period
 
$
33,895

 
$
49,531

 
$
40,916

 
$
63,683

Total gain (loss) included in electricity sales
 
83

 
2,326

 
4,144

 
1,659

Settlements
 
(3,196
)
 
(3,144
)
 
(14,278
)
 
(16,629
)
Balances, end of period
 
$
30,782

 
$
48,713

 
$
30,782

 
$
48,713

Carrying Amounts and Fair Values of Company's Financial Liabilities
The following table presents the carrying amount and fair value and the fair value hierarchy of the Company’s financial liabilities that are not measured at fair value in the consolidated balance sheets, but for which fair value is disclosed (in thousands):
 
 
 
Fair Value
 
As reflected on the balance sheet
 
Level 1
 
Level 2
 
Level 3
 
Total
September 30, 2017
 
 
 
 
 
 
 
 
 
Long-term debt, including current portion
$
2,182,820

 
$

 
$
2,187,346

 
$

 
$
2,187,346

December 31, 2016
 
 
 
 
 
 
 
 
 
Long-term debt, including current portion
$
1,383,672

 
$

 
$
1,382,038

 
$

 
$
1,382,038