Note Segment reporting (Geographic information) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net Revenue	[1]	$ 477,967	$ 464,042
PUERTO RICO
Segment Reporting Information [Line Items]
Net Revenue	[1]	384,448	380,036
UNITED STATES
Segment Reporting Information [Line Items]
Net Revenue	[1]	74,843	64,640
Other
Segment Reporting Information [Line Items]
Net Revenue	[1]	$ 18,676	$ 19,366

[1] Total revenues include net interest income (expense) , service charges on deposit accounts, other service fees, mortgage banking activities, net gain (loss) and valuation adjustments on investment securities, trading account (loss) profit, net (loss) gain on sale of loans and valuation adjustments on loans held-for-sale, adjustments to indemnity reserves on loans sold, FDIC loss share ( expense ) income and other operating income .