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MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques
Servicing asset, measurement input	8.33%	12.64%	8.35%	13.76%
Discount rate
Fair Value Measurement Inputs and Valuation Techniques
Servicing asset, measurement input	8.48%	7.88%	8.43%	7.86%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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