JUNIOR SUBORDINATED DEBENTURES (Details) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2021	Mar. 31, 2021
JUNIOR SUBORDINATED DEBENTURES
Amount Outstanding		$ 27,836
Fair value adjustment	[1]	(1,066)
Total Debentures		$ 26,770	$ 26,748
Riverview Bancorp Statutory Trust I
JUNIOR SUBORDINATED DEBENTURES
Issuance Date		Dec. 01, 2005
Amount Outstanding		$ 7,217
Rate Type	[2]	Variable
Initial Rate		5.88%
Current Rate		1.48%
Maturity Date		2036-03
Riverview Bancorp Statutory Trust II
JUNIOR SUBORDINATED DEBENTURES
Issuance Date		Jun. 01, 2007
Amount Outstanding		$ 15,464
Rate Type	[3]	Variable
Initial Rate		7.03%
Current Rate		1.47%
Maturity Date		2037-09
Merchants Bancorp Statutory Trust I
JUNIOR SUBORDINATED DEBENTURES
Issuance Date	[1]	Jun. 01, 2003
Amount Outstanding	[1]	$ 5,155
Rate Type	[1],[4]	Variable
Initial Rate	[1]	4.16%
Current Rate	[1]	3.25%
Maturity Date	[1]	2033-06

[1] Amount, net of accretion, attributable to a prior year’s business combination

[2] The trust preferred securities reprice quarterly based on the three-month LIBOR plus 1.36%.

[3] The trust preferred securities reprice quarterly based on the three-month LIBOR plus 1.35%.

[4] The trust preferred securities reprice quarterly based on the three-month LIBOR plus 3.10%.