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Balance Sheet Information (Details 3) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2014
Goodwill    
Balance at the beginning of the period   $ 91,348,000
Purchase price adjustment   173,000
Balance at the end of the period 91,521,000 91,521,000
Tools
   
Property, plant and equipment, net    
Assets held for sale 2,900,000 2,900,000
Assets converted and sold 3,200,000 4,600,000
Aggregate selling price $ 4,700,000 $ 7,000,000