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LOAN PORTFOLIO - Corporation's TDR Activity (Parenthetical) (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Financing Receivable Modifications [Line Items]
Loans held for investment transferred to held for sale	$ 10,114	$ 69,851
TDR [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable Modifications [Line Items]
Charge Offs Loans Held For Sale		5,100
Loans held for investment transferred to held for sale		$ 30,000

X

- Definition

Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations.

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Value of loans and leases held in the entity's portfolio transferred to loans and leases held-for-sale in noncash transactions.

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