XML 19 R105.htm IDEA: XBRL DOCUMENT v3.19.2
FAIR VALUE MEASUREMENTS - Additional Information (Detail) - USD ($)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Fair Value Measurements Disclosure [Line Items]      
Transfer of assets and liabilities between the hierarchy levels $ 0 $ 0  
Allocated allowance for loan losses 2,700,000    
Provision for fair value measurements included in allowance for loan losses 5,100,000    
Carrying amount of OREO 2,500,000    
Written down of OREO 1,600,000    
Loss from OREO included in earnings 500,000    
Fair Value, Nonrecurring [Member]      
Fair Value Measurements Disclosure [Line Items]      
Impaired loans, carrying amount 5,200,000    
Allocated allowance for loan losses 5,000,000   $ 15,000,000
Mortgage Servicing Rights [Member]      
Fair Value Measurements Disclosure [Line Items]      
Valuation allowance for servicing rights 3,100,000    
Mortgage Servicing Rights [Member] | Fair Value, Nonrecurring [Member]      
Fair Value Measurements Disclosure [Line Items]      
Servicing asset, gross 27,600,000    
Servicing asset 24,600,000    
Valuation allowance for servicing rights $ 2,600,000