DEPOSITS: Summary of Deposit Accounts (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Deposit [Line Items]
Total	$ 995,691	$ 980,058
Non-interest-bearing
Deposit [Line Items]
Total	278,966	242,738
Interest-bearing checking
Deposit [Line Items]
Total	192,989	171,152
Money market
Deposit [Line Items]
Total	265,661	289,998
Savings accounts
Deposit [Line Items]
Total	134,931	126,370
Certificates of deposit
Deposit [Line Items]
Total	$ 123,144	$ 149,800