Note Segment reporting (Geographic information) (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Net Revenue	[1]	$ 607,393	$ 506,544
PUERTO RICO
Segment Reporting Information [Line Items]
Net Revenue	[1]	500,138	399,414
UNITED STATES
Segment Reporting Information [Line Items]
Net Revenue	[1]	89,856	86,528
Other
Segment Reporting Information [Line Items]
Net Revenue	[1]	$ 17,399	$ 20,602

[1] Total revenues include net interest income, service charges on deposit accounts, other service fees, mortgage banking activities, net profit ( loss) on trading account debt securities , net gain (loss) , including impairment on equity securities, adjustments (expense) to indemnity reserves on loans sold, FDIC loss share e xpense and other operating income .