Revenue Recognition - Summary of Non Interest Income, Segregated by Revenue Streams in-Scope and Out-of-Scope of Topic 606 (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Noninterest income:
Gain on OREO, net	$ 105	$ 3,540
Other	2,044	1,391
Total noninterest income	16,303	12,916
Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	5,141	4,045
Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	2,182	2,157
Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	950	804
Accounting Standards Update 2014-09 [Member]
Noninterest income:
Gain on OREO, net	105	3,540
Other	2,044	1,391
Total noninterest income	10,422	11,937
Accounting Standards Update 2014-09 [Member] \| Service Charges on Deposit Accounts [Member]
Noninterest income:
Revenue from contract with customer	5,141	4,045
Accounting Standards Update 2014-09 [Member] \| Trust and Investment Services [Member]
Noninterest income:
Revenue from contract with customer	2,182	2,157
Accounting Standards Update 2014-09 [Member] \| Bankcard Services [Member]
Noninterest income:
Revenue from contract with customer	950	804
Accounting Standards Update 2014-09 Not Adopted [Member]
Noninterest income:
Total noninterest income	$ 5,881	$ 979

The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.14(d))
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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Represents the total of noninterest income derived from certain activities and assets including (for example): (1) venture capital investments; (2) bank owned life insurance; (3) foreign currency transactions; and (4) mortgage servicing rights.

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Amount, including 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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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