Fair value measurements (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of valuation methodology for assets and liabilities at fair value

The following section describes the valuation methodology used to measure our financial assets and liabilities that were accounted for at fair value.



Overview of Century’s valuation methodology
	Level	Significant inputs
Cash equivalents	1	Quoted market prices
Trust assets (1)	1	Quoted market prices
Surety bonds	1	Quoted market prices
E.ON contingent obligation	3	Quoted LME forward market, management’s estimates of the LME forward market prices for periods beyond the quoted periods and management’s estimate of future level of operations

(1)

Trust assets are currently invested in money market funds. These trust assets are held to fund the non-qualified supplemental executive pension benefit obligations for certain of our officers. The trust has sole authority to invest the funds in secure interest producing investments consisting of short-term securities issued or guaranteed by the United States government or cash and cash equivalents.

Financial assets and liabilities at fair value on a recurring basis

The following table sets forth our financial assets and liabilities that were accounted for at fair value on a recurring basis by the level of input within the ASC 820 fair value hierarchy. Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and the placement within the fair value hierarchy levels. There were no transfers between Level 1 and 2 during the periods presented. There were no transfers into or out of Level 3 during the periods presented. It is our policy to recognize transfers into and transfers out of Level 3 as of the actual date of the event or change in circumstances that caused the transfer.



Recurring Fair Value Measurements	As of December 31, 2015
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash equivalents	$	102,675	$	—	$	—	$	102,675
Trust assets	5,226		—		—		5,226
Surety bonds	1,870		—		—		1,870
TOTAL	$	109,771	$	—	$	—	$	109,771
LIABILITIES:
E.ON contingent obligation – net (1)	$	—	$	—	$	—	$	—
TOTAL	$	—	$	—	$	—	$	—



Recurring Fair Value Measurements	As of December 31, 2014
	Level 1		Level 2		Level 3		Total
ASSETS:
Cash equivalents	$	137,712	$	—	$	—	$	137,712
Trust assets	8,067		—		—		8,067
Surety bonds	1,987		—		—		1,987
TOTAL	$	147,766	$	—	$	—	$	147,766
LIABILITIES:
E.ON contingent obligation – net (1)	$	—	$	—	$	—	$	—
TOTAL	$	—	$	—	$	—	$	—


(1)	See Note 5 Debt for additional information about the E.ON contingent obligation.