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STOCK-BASED COMPENSATION - Restricted Stock - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Mar. 31, 2017
Sep. 30, 2018
Sep. 30, 2017
Omnibus Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted shares of restricted stock       407,886  
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period       11,000  
Omnibus Plan [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share based compensation cost $ 0.8 $ 1.0   $ 2.7 $ 3.0
Stock based compensation expense unrecognized related to nonvested shares of restricted stock $ 2.9     $ 2.9  
Period for cost recognition not yet recognized       1 year 4 months 24 days  
Omnibus Plan [Member] | Restricted Stock [Member] | Director [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted shares of restricted stock       65,447 140,360
Restricted stock lapse, maximum       1 year 1 year
Omnibus Plan [Member] | Restricted Stock [Member] | Management [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted shares of restricted stock       342,439 951,332
Restricted stock lapse, maximum         2 years
Retirement Eligible Shares       20,447  
Omnibus Plan [Member] | Restricted Stock [Member] | Restricted stock vesting after two years [Member] | Management [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock vesting percentage       50.00%  
Omnibus Plan [Member] | Restricted Stock [Member] | Restricted stock vesting after three years [Member] | Management [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock vesting percentage       50.00%  
Troubled Asset Relief Program [Member] | Restricted Stock [Member] | Senior Officers [Member] | Government [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Granted shares of restricted stock     838,332