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Restatement of Previously Issued Consolidated Financial Statements - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2010
Sep. 30, 2010
Error Corrections and Prior Period Adjustments Restatement [Line Items]              
Income tax benefit   $ (3,335) $ 8,901 $ 1,435      
Decrease in accumulated earnings         $ 20,900    
Increase in net operating loss and corresponding deferred tax asset           $ 14,300  
Merger, percentage of interests acquired             51.00%
Reversal of Debt Issuance Cost [Member]              
Error Corrections and Prior Period Adjustments Restatement [Line Items]              
Income tax benefit $ (11,800)