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FAIR VALUE MEASUREMENTS - Summary of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets
Loans held for sale	$ 787,035	$ 1,074,348
Pledged securities	121,767	116,331	$ 97,859	$ 84,850
Derivative assets	15,568	35,536
Liabilities
Derivative liabilities	36	32,697
Recurring
Assets
Loans held for sale	787,035	1,074,348
Pledged securities	121,767	116,331
Derivative assets	15,568	35,536
Total financial assets	924,370	1,226,215
Liabilities
Derivative liabilities	36	32,697
Total financial liabilities	36	32,697
Level 1 \| Recurring
Assets
Pledged securities	7,204	9,469
Total financial assets	7,204	9,469
Level 2 \| Recurring
Assets
Loans held for sale	787,035	1,074,348
Pledged securities	114,563	106,862
Total financial assets	901,598	1,181,210
Level 3 \| Recurring
Assets
Derivative assets	15,568	35,536
Total financial assets	15,568	35,536
Liabilities
Derivative liabilities	36	32,697
Total financial liabilities	$ 36	$ 32,697