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

COMMITMENTS AND CONTINGENCIES - Allowance for Unfunded Commitments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2020	Jan. 01, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance, Allowance	$ 38,189	$ 28,819
Adjustment to reflect adoption of ASU 2016-13			$ (56,704)	$ (276)
Provision for unfunded commitments	37,047	3,408
Ending balance, Allowance	149,524	$ 28,659
Unfunded loan commitments
Financing Receivable, Allowance for Credit Loss [Line Items]
Beginning balance, Allowance	1,077
Adjustment to reflect adoption of ASU 2016-13			$ 12,714
Provision for unfunded commitments	4,000
Ending balance, Allowance	$ 17,791