Fair Value of Financial Instruments - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities, Fair Value		$ 33,824
Realized gain on available-for-sale securities	$ 24,465
Deferred tax assets, valuation allowance		8,700
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value senior note	310,500	315,000
Yodlee, Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cost basis investment		9,800
Additional investment			$ 1,000
Total investments			$ 10,800
Realized gain on available-for-sale securities	$ 24,500	23,000
Cost basis price appreciation of shares		10,800
Yodlee, Inc. [Member] | Equity securities [Member] | Quoted prices in active markets for identical assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-Sale Securities, Fair Value		$ 33,800