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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)
 12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of goodwill
    Year Ended December 31,  
(In thousands)   2017     2016  
Balance at beginning of period   $ 105,950     $ 98,445  
Measurement period adjustments(1)     —       7,505  
Balance at end of period   $ 105,950     $ 105,950  
(1) See Note 22 for details on the measurement period adjustments.

 
Schedule of acquired intangible assets
    December 31,  
    2017     2016  
(In thousands)   Gross
Carrying
Amount		     Accumulated
Amortization		     Gross
Carrying
Amount		     Accumulated
Amortization		  
Intangible assets subject to amortization:                                
Core deposit intangibles   $ 7,211     $ 3,409     $ 7,211     $ 2,362  
Intangible assets not subject to amortization:                                
Trademark     255       —       —       —  
Total intangible assets   $ 7,466     $ 3,409     $ 7,211     $ 2,362  

 
Schedule of estimated amortization expense
(In thousands)   Total  
2018   $ 917  
2019     787  
2020     656  
2021     531  
2022     413  
Thereafter     498  
Total   $ 3,802