STOCK-BASED COMPENSATION - Performance Units - Additional Information (Detail) - Omnibus Plan [Member] - Performance Shares [member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted performance units	160,485
Stock-based compensation expense	$ 2.0	$ 1.8	$ 1.1
Unrecognized compensation cost related to unvested performance units	$ 2.2
Executives [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted performance units	160,485	502,307	200,053
Performance units program description	These awards do not contain non-forfeitable rights to dividend equivalent amounts and can only be settled in shares of the Corporation’s common stock. The performance units will vest on the third anniversary of the effective date of the awards, subject to the achievement of a pre-established tangible book value per share target as of December 31, 2023. All 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 not less than 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.