NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill and other intangible assets (Detail) - Customer Relationships [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Feb. 15, 2016	Jun. 30, 2012
Credit Card [Member]
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	$ 24,465	$ 24,465		$ 24,500
Property, Liability and Casualty Insurance Product Line [Member]
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross	$ 1,067	$ 1,067
Property, Liability and Casualty Insurance Product Line [Member] | Doral Bank Transaction Member [Member]
Finite Lived Intangible Assets [Line Items]
Finite Lived Intangible Assets Gross			$ 1,100