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Debt (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Schedule of Debt



	September 30, 2015			December 31, 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 $2,822 and $3,112, respectively, interest payable semiannually	247,178			246,888
Total	$	254,993		$	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 September 30, 2015 was 0.22%.

Schedule of Line of Credit Facilities

Status of our U.S. revolving credit facility:



	September 30, 2015
Credit facility maximum amount	$	150,000
Borrowing availability, net of outstanding letters of credit	50,026
Outstanding borrowings	—
Letter of credit sub-facility amount	110,000
Outstanding letters of credit issued	63,005

Status of our Iceland revolving credit facility:



	September 30, 2015
Credit Facility maximum amount	$	50,000
Borrowing availability	50,000
Outstanding borrowings	—

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	September 30, 2015			December 31, 2014
E.ON contingent obligation – principal	Other liabilities	$	(12,902	)	$	(12,902	)
E.ON contingent obligation – accrued interest	Other liabilities	(6,350		)	(5,291		)
E.ON contingent obligation – derivative asset	Other liabilities	19,252			18,193
		$	—		$	—