FAIR VALUE MEASUREMENT Reconciliation Assets Measured at Fair Value on a Recurring Basis Using Unobservable Inputs (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)
Corporate Bond Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 57,698
Unrealized Loss Reported in AOCI	101,351
Effect of exchange rate changes	(5,436)
Ending Balance	153,613
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Unrealized Loss Reported in AOCI	101,351
Effect of exchange rate changes	(5,436)
Dio Equity Option Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unobservable Input, Unrealized Gain (Loss)	107
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized Loss Reported in AOCI	0
Effect of exchange rate changes	8
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Beginning Balance	(115)
Unrealized Loss Reported in AOCI	0
Effect of exchange rate changes	8
Ending Balance	$ 0