Other, net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Income Expense [Line Items]
Realized gain on available-for-sale securities	$ 24,465
Deferred tax assets, valuation allowance		$ 8,700
Yodlee, Inc. [Member]
Other Income Expense [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