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Other Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Gross carrying value:    
Total gross carrying value $ 800 $ 800
Accumulated amortization:    
Total accumulated amortization (770) (681)
Intangible assets, net 30 119
Deferred tax assets, net 3,277 4,482
Deferred pre-contract costs 0 1,113
Other 1,613 1,486
Other Assets, Noncurrent, Total 4,920 7,200
Industrial Group [Member]
    
Gross carrying value:    
Total gross carrying value 800 800
Accumulated amortization:    
Total accumulated amortization (770) (681)
Electronics Group [Member]
    
Gross carrying value:    
Total gross carrying value 0 0
Accumulated amortization:    
Total accumulated amortization $ 0 $ 0