DESCRIPTION OF BUSINESS AND PRINCIPLES OF INTERIM STATEMENTS - Recently Issued Accounting Standards - Credit Losses (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Commercial loans
Credit Losses
Current expected credit losses reserve	$ 252

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant