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MORTGAGE BANKING INCOME MORTGAGE BANKING INCOME
 12 Months Ended
Dec. 31, 2017
Other Income and Expenses [Abstract]  
MORTGAGE BANKING INCOME
15. MORTGAGE BANKING INCOME

Noninterest income from the Company's mortgage banking activities include the following components for the periods presented:

 
Year Ended December 31,
 
2017
 
2016
 
2015
 
(Dollars in thousands)
Mortgage banking income:
 
 
 
 
 
Loan servicing fees
$
5,337

 
$
5,421

 
$
5,656

Amortization of mortgage servicing rights
(2,288
)
 
(5,066
)
 
(4,185
)
Net gain on sale of residential mortgage loans
4,069

 
7,631

 
6,107

Unrealized gain (loss) on interest rate locks
(156
)
 
83

 
(324
)
Total mortgage banking income
$
6,962

 
$
8,069

 
$
7,254