Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Outstanding Forward and Future Contracts [Table Text Block]

As of March 31, 2013, the Company had the following outstanding future contracts with settlement dates ranging from May to June, 2013.

Commodity	Amount
Silver	165,000	ounces
Gold	1,000	ounces

Effect of Derivative Instruments on the Consolidated Statements of Operations [Table Text Block]

Effect of Derivative Instruments on the Consolidated Income Statements

(in thousands)		Three Months Ended
		March 31,
Derivative	Income Statement Line	2013			2012
Commodity contracts	Realized and unrealized (loss) gain on derivatives	$	354		$	257
Interest rate swap agreement	Interest expense	(277		)	—
Derivative features of Subordinated Notes	Realized and unrealized (loss) gain on derivatives	(793		)	641
	Total derivatives not designated as hedging instruments	$	(716	)	$	898
	Total derivatives	$	(716	)	$	898

Derivative Instruments in the Consolidated Balance Sheets, Fair Value [Table Text Block]

Fair Value of Derivative Instruments in the Consolidated Balance Sheets

(in thousands)		March 31,			December 31,
Derivative	Balance Sheet Location	2013			2012
Commodity contracts	Other current assets	$	88		$	100
Interest rate swap agreement	Other liabilities	(277		)	—
Derivative features of Subordinated Notes	Long-term debt and long-term debt - related party	—			793
	Total derivatives not designated as hedging instruments	$	(189	)	$	893
	Total derivatives	$	(189	)	$	893