STOCK-BASED COMPENSATION - Performance Units - Additional Information (Detail) - Omnibus Plan [Member] - Performance Units [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted performance units			502,307
Stock-based compensation expense	$ 0.5	$ 0.3	$ 1.3	$ 0.8
Unrecognized compensation cost related to unvested shares	$ 3.1		$ 3.1
Executives [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted performance units			502,307	200,053
Requisite service period			3 years	3 years
Performance Units Program Description			The performance units will vest based on the achievement of a pre-established tangible book value per share target as of December 31, 2022. All of the performance units will vest if performance is at the pre-established performance target level or above. However, the participants may vest with respect to 50% of the awards to the extent that performance is below the target but at 80% of the pre-established performance target level (the “80% minimum threshold”), which is measured based upon the growth in the tangible book value during the performance cycle. If performance is between the 80% minimum threshold and the pre-established performance target level, the participants will vest on a proportional amount. No performance units will vest if performance is below the 80% minimum threshold.