Debt (Tables)

12 Months Ended

Dec. 31, 2015



	December 31,
	2015		2014
Debt classified as current liabilities:
Hancock County industrial revenue bonds ("IRBs") due 2028, interest payable quarterly (variable interest rates (not to exceed 12%)) (1)	$	7,815	$	7,815
Debt classified as non-current liabilities:
7.5% senior secured notes due June 1, 2021, net of debt discount of $2,722 and $3,112, respectively, interest payable semiannually	247,278		246,888
Total	$	255,093	$	254,703


(1)	The IRBs are classified as current liabilities because they are remarketed weekly and could be required to be repaid upon demand if there is a failed remarketing. The IRB interest rate at December 31, 2015 was 0.21%.

Schedule of line of credit facilities

Status of our U.S. revolving credit facility:



	December 31, 2015
Credit facility maximum amount	$	150,000
Borrowing availability	81,292
Outstanding letters of credit issued	46,346
Outstanding borrowings	—
Borrowing availability, net of outstanding letters of credit and borrowings	34,946

Status of our Iceland revolving credit facility:



	December 31, 2015
Credit Facility maximum amount	$	50,000
Borrowing availability	49,294
Outstanding letters of credit issued	—
Outstanding borrowings	—
Borrowing availability, net of outstanding letters of credit and borrowings	49,294

Debt Instrument Redemption

Prior to June 1, 2016, we may redeem the 2021 Notes, in whole or in part, at a redemption price equal to 100% of the principal amount plus a make-whole premium, and if redeemed during the twelve-month period beginning on June 1 of the years indicated below, at the following redemption prices plus accrued and unpaid interest:



Year	Percentage
2016	105.625%
2017	103.750%
2018	101.875%
2019 and thereafter	100.000%

Offsetting of financial instruments and derivatives

The following table provides information about the balance sheet location and gross amounts offset:



Offsetting of financial instruments and derivatives
	Balance sheet location	December 31, 2015			December 31, 2014
E.ON contingent obligation – principal	Other liabilities	$	(12,902	)	$	(12,902	)
E.ON contingent obligation – accrued interest	Other liabilities	(6,702		)	(5,291		)
E.ON contingent obligation – derivative asset	Other liabilities	19,604			18,193
		$	—		$	—