Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Inventory	$ 3,454	$ 7,457
Federal tax carryforwards	6,459	11,774	15,100
Share-based compensation	2,621	2,271
Receivables	98	684
Accrued liabilities	633	746
Other	65	65
Total current deferred tax assets	13,330	22,997
Federal and state tax carryforwards	15,553	4,640
Property, plant and equipment (noncurrent)	58,085	59,867
Other (current)	288	258
Deferred tax liabilities	$ 58,373	$ 60,125