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Note Income taxes (Components of income tax expense) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Current income tax expense      
Puerto Rico $ 126,700 $ 17,356 $ 11,031
Federal and States 6,841 6,046 7,059
Subtotal current income tax expense 133,541 23,402 18,090
Deferred income tax expense (benefit)      
Puerto Rico (62,601) 31,132 36,423
Federal and States 20,953 7,938 24,271
Adjustments in net deferred tax due to change in tax law 27,686 168,358 0
Subtotal deferred income tax expense (benefit) (13,962) 207,428 60,694
Income tax expense $ 119,579 $ 230,830 $ 78,784