LOANS AND LEASES - Impaired Loans and Lease (Detail) - Originated Loans and Leases [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	$ 115,995	$ 93,479
Recorded Investment With No Specific Reserve	76,884	72,393
Recorded Investment With Specific Reserve	18,704	9,460
Total Recorded Investment	95,588	81,853
Specific Reserve	8,659	3,203
Average Recorded Investment	100,652	86,388
Commercial Real Estate [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	28,519	23,771
Recorded Investment With No Specific Reserve	21,804	19,699
Recorded Investment With Specific Reserve	2,269	464
Total Recorded Investment	24,073	20,163
Specific Reserve	416	13
Average Recorded Investment	24,348	19,217
Commercial and Industrial [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	39,760	25,719
Recorded Investment With No Specific Reserve	15,327	14,781
Recorded Investment With Specific Reserve	16,435	8,996
Total Recorded Investment	31,762	23,777
Specific Reserve	8,243	3,190
Average Recorded Investment	37,340	29,730
Commercial Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	1,199	3,429
Recorded Investment With No Specific Reserve	1,199	3,429
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	1,199	3,429
Specific Reserve	0	0
Average Recorded Investment	1,608	3,394
Total Commercial Loans and Leases [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	69,478	52,919
Recorded Investment With No Specific Reserve	38,330	37,909
Recorded Investment With Specific Reserve	18,704	9,460
Total Recorded Investment	57,034	47,369
Specific Reserve	8,659	3,203
Average Recorded Investment	63,296	52,341
Direct Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	19,648	16,440
Recorded Investment With No Specific Reserve	17,131	14,952
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	17,131	14,952
Specific Reserve	0	0
Average Recorded Investment	16,729	14,997
Residential Mortgages [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	16,883	14,090
Recorded Investment With No Specific Reserve	15,564	13,367
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	15,564	13,367
Specific Reserve	0	0
Average Recorded Investment	15,059	13,200
Indirect Installment [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	5,219	5,172
Recorded Investment With No Specific Reserve	2,123	2,180
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	2,123	2,180
Specific Reserve	0	0
Average Recorded Investment	2,032	2,037
Consumer Lines of Credit [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	4,767	3,858
Recorded Investment With No Specific Reserve	3,736	2,985
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	3,736	2,985
Specific Reserve	0	0
Average Recorded Investment	3,536	2,813
Other [Member]
Financial Receivables Impaired Or Restructured [Line Items]
Unpaid Contractual Principal Balance	0	1,000
Recorded Investment With No Specific Reserve	0	1,000
Recorded Investment With Specific Reserve	0	0
Total Recorded Investment	0	1,000
Specific Reserve	0	0
Average Recorded Investment	$ 0	$ 1,000