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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets:    
Inventories $ 2,943 $ 3,200
Employee salary and benefits 3,653 3,860
Insurance 489 562
Depreciation and amortization 2,359 10,029
Net operating loss carryforwards 45,859 39,834
General business credit carryforwards 12,900 11,897
Reserves not currently deductible 8,883 9,643
Gross deferred tax assets 77,086 79,025
Less: Valuation allowance (71,827) (71,790)
Deferred tax assets less valuation allowance 5,259 7,235
Deferred tax liabilities:    
Depreciation and amortization (23,718) (29,615)
Basis difference - equity investee (31,016) (31,016)
Other (1,764) (4,315)
Gross deferred tax liabilities (56,498) (64,946)
Net deferred tax liability $ (51,239) $ (57,711)