v3.3.1.900
Variable Interest Entity - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Variable Interest Entity [Line Items]    
Earnings (loss) in equity of unconsolidated affiliate $ (300) $ 100
Trade receivables 1,500 2,800
Accrued and other current liabilities 44,759 52,812
Other assets 0 0
Operating revenue $ 0 3,400
PHIC's date of incorporation May 26, 2011  
PHI Century Limited [Member]    
Variable Interest Entity [Line Items]    
Investment in the common stock 49.00%  
Accrued and other current liabilities   $ 900
Allowance for Trade Receivables [Member]    
Variable Interest Entity [Line Items]    
Allowance for bad debts against trade receivables $ 1,500