(7) Fair Value Measurements: Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2013
Warrant
Total unrealized losses included in earnings	$ (1,390)	$ (6,645)
Gain (loss) recognized in income	(1,390)	(6,645)
Embedded Derivative
Total unrealized losses included in earnings	285	45
Gain (loss) recognized in income	285	45
Exchange Traded Futures
Total unrealized losses included in earnings	0	104
Gain (loss) recognized in income	0	104
Physical Forward Contacts
Total unrealized losses included in earnings	0	306
Gain (loss) recognized in income	0	306
Fair Value, Inputs, Level 3
Balance, at December 31, 2012		(10,945)
Purchases, issuances, and settlements		(10,500)
Total unrealized losses included in earnings		(6,645)
Transfers		0
Balance, at September 30, 2013	(28,090)	(28,090)
Gain (loss) recognized in income		$ (6,645)

Amount of gain (loss) recognized in the income statement of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19279-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfers of financial instrument classified as a derivative asset (liability) after deduction of derivative liability (asset) into (out of) level 3 of the fair value hierarchy.

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Fair value of financial instrument classified as derivative asset (liability) after deduction of derivative liability (asset), measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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