SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Contracts with Customers (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Contracts with Customers
Revenue from contracts with customer	$ 16,899	$ 26,826	$ 53,311	$ 47,319
Loan Origination Fees \| Loan Origination and Debt Brokerage Fees, Net
Contracts with Customers
Revenue from contracts with customer	8,689	15,381	30,037	26,912
Investment Sales Broker Fees, Investment Management Fees, Assumption Fees, Application Fees and Other \| Other Revenues
Contracts with Customers
Revenue from contracts with customer	$ 8,210	$ 11,445	$ 23,274	$ 20,407

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Period Type:	duration