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CREDIT QUALITY ASSESSMENT (Impaired Loans by Portfolio) (Detail) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Financing Receivable Impaired [Line Items]    
Average impaired loans for the period $ 27,840 $ 29,828
Contractual interest income due on impaired loans during the period 1,099 2,527
Interest income on impaired loans recognized on a cash basis 507 961
Interest income on impaired loans recognized on an accrual basis 119 274
Commercial    
Financing Receivable Impaired [Line Items]    
Average impaired loans for the period 5,289 4,714
Contractual interest income due on impaired loans during the period 278 450
Interest income on impaired loans recognized on a cash basis 72 273
Interest income on impaired loans recognized on an accrual basis 65 113
All Other    
Financing Receivable Impaired [Line Items]    
Average impaired loans for the period 5,390 4,869
Contractual interest income due on impaired loans during the period 86 208
Interest income on impaired loans recognized on a cash basis 21 104
Interest income on impaired loans recognized on an accrual basis 21 43
Commercial Real Estate Portfolio Segment | Commercial Acquisition, Development and Construction    
Financing Receivable Impaired [Line Items]    
Average impaired loans for the period 159 882
Contractual interest income due on impaired loans during the period 144 304
Interest income on impaired loans recognized on a cash basis 0 11
Interest income on impaired loans recognized on an accrual basis 0 0
Commercial Real Estate Portfolio Segment | Commercial Investor Real Estate    
Financing Receivable Impaired [Line Items]    
Average impaired loans for the period 10,035 11,145
Contractual interest income due on impaired loans during the period 384 918
Interest income on impaired loans recognized on a cash basis 10 226
Interest income on impaired loans recognized on an accrual basis 15 107
Commercial Real Estate Portfolio Segment | Commercial Owner Occupied Real Estate    
Financing Receivable Impaired [Line Items]    
Average impaired loans for the period 6,967 8,218
Contractual interest income due on impaired loans during the period 207 647
Interest income on impaired loans recognized on a cash basis 404 347
Interest income on impaired loans recognized on an accrual basis $ 18 $ 11