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Fair Value Measurements - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Parenthetical) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash/Non-negotiable time deposits - not subject to fair value disclosure requirements $ 357,855 $ 227,574 $ 192,713 $ 305,437
Cash [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash/Non-negotiable time deposits - not subject to fair value disclosure requirements 102,950 110,118    
Non-Negotiable Time Deposits [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Cash/Non-negotiable time deposits - not subject to fair value disclosure requirements $ 11,745 $ 11,016