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LOAN COMMITMENTS AND OTHER RELATED ACTIVITIES - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Other Commitments [Line Items]  
Commitments to make loans period, maximum 30 days
Commitments to sell loans under residential mortgage division $ 684.0
TBAs commitments  
Other Commitments [Line Items]  
Commitments to sell loans under residential mortgage division 632.0
Best efforts commitments  
Other Commitments [Line Items]  
Commitments to sell loans under residential mortgage division 52.0
Interest rate lock commitments  
Other Commitments [Line Items]  
Commitments to sell loans under residential mortgage division $ 278.9