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LOAN PORTFOLIO - Loan Modifications are Considered TDRs (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) numberofcontracts	Sep. 30, 2017 USD ($) numberofcontracts	Sep. 30, 2018 USD ($) numberofcontracts	Sep. 30, 2017 USD ($) numberofcontracts
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	311	346	854	1,147
Pre-Modification Outstanding Recorded Investment	$ 108,192	$ 29,388	$ 165,236	$ 84,100
Post-Modification Outstanding Recorded Investment	$ 107,357	$ 29,101	$ 164,004	$ 83,368
Non Fha Va Residential Mortgage Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	27	25	70	113
Pre-Modification Outstanding Recorded Investment	$ 6,316	$ 3,358	$ 10,958	$ 17,585
Post-Modification Outstanding Recorded Investment	$ 5,729	$ 3,358	$ 10,277	$ 17,349
Commercial Mortgage Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	4	4	9	12
Pre-Modification Outstanding Recorded Investment	$ 96,088	$ 2,569	$ 138,599	$ 25,274
Post-Modification Outstanding Recorded Investment	$ 95,867	$ 2,318	$ 138,390	$ 24,783
Commercial And Industrial Loan [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	2	8	8	13
Pre-Modification Outstanding Recorded Investment	$ 2,800	$ 21,079	$ 8,850	$ 32,153
Post-Modification Outstanding Recorded Investment	$ 2,786	$ 21,019	$ 8,496	$ 32,093
Land [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts		1	1	2
Pre-Modification Outstanding Recorded Investment		$ 18	$ 97	$ 43
Post-Modification Outstanding Recorded Investment		$ 18	$ 97	$ 46
Construction-residential [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	1		1
Pre-Modification Outstanding Recorded Investment	$ 587		$ 587
Post-Modification Outstanding Recorded Investment	$ 558		$ 558
Consumer Auto Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	74	109	195	383
Pre-Modification Outstanding Recorded Investment	$ 1,281	$ 1,568	$ 3,206	$ 5,741
Post-Modification Outstanding Recorded Investment	$ 1,281	$ 1,568	$ 3,200	$ 5,741
Finance Leases [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	5		5	22
Pre-Modification Outstanding Recorded Investment	$ 82		$ 82	$ 548
Post-Modification Outstanding Recorded Investment	$ 80		$ 80	$ 548
Consumer Portfolio Segment [Member]
Financing Receivable Modifications [Line Items]
Number of Contracts | numberofcontracts	198	199	565	602
Pre-Modification Outstanding Recorded Investment	$ 1,038	$ 796	$ 2,857	$ 2,756
Post-Modification Outstanding Recorded Investment	$ 1,056	$ 820	$ 2,906	$ 2,808

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