Summary of Number of Shares Granted Each Year (Detail) - Unvested Restricted Awards - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares	[1]	388,211	672,724	1,667,246
Market value		$ 14.9	$ 20.6	$ 41.3

[1] Includes the issuance of approximately 870,361 stock replacement awards in connection with the acquisition of NetSpend in 2013. These awards had a market value of $21.5 million. A portion of the expense associated with these options has been included as a component of the total purchase price of the NetSpend acquisition. Refer to Note 24.