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Discontinued Operations - Assets and Liabilities Held For Sale (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Disposal Group Including Discontinued Operation Balance Sheet Disclosures [Abstract]    
Current assets held for sale $ 0 $ 0
Long-term assets held for sale 650 650
Total assets held for sale 650 650
Current liabilities held for sale 0 0
Total liabilities held for sale 0 0
Net assets and liabilities held for sale $ 650 $ 650