POTENTIAL ACQUISITION OF BANCO SANTANDER PUERTO RICO - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020
Business Acquisition [Line Items]
Merger and Restructuring costs	$ 845	$ 0
Acquisition And Merger [Member]
Business Acquisition [Line Items]
Business Acquisition Purchase Price To Tangible Common Equity	117.50%
Acquisition Premium	$ 65,000		$ 65,000
Excess Capital Percentage Business Acquisition Purchase Price	100.00%
Merger and Restructuring costs	$ 800		$ 12,200