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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill

A summary of the other intangible assets that continue to be subject to amortization is as follows:

 

(Dollars in thousands)   As of September 30, 2017  
    Gross carrying
amount		     Accumulated
amortization		     Net carrying
amount		  
Core deposit intangible assets   $ 2,067     $ (1,324 )   $ 743  
Lease intangible asset     350       (177 )     173  
Mortgage servicing rights     6,169       (3,343 )     2,826  
Total other intangible assets   $ 8,586     $ (4,844 )   $ 3,742  

 

(Dollars in thousands)   As of December 31, 2016  
    Gross carrying
amount		     Accumulated
amortization		    

Net carrying

amount

  
Core deposit intangible assets   $2,067     $(1,137)     $930  
Lease intangible asset     350       (143 )     207  
Mortgage servicing rights     5,788       (2,939 )     2,849  
Total other intangible assets   $ 8,205     $ (4,219 )   $ 3,986  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following sets forth estimated amortization expense for core deposit and lease intangible assets for the remainder of 2017 and in successive years ending December 31:

 

    Amortization  
(Dollars in thousands)    expense  
Remainder of 2017   $ 68  
2018     252  
2019     214  
2020     177  
2021     121  
Thereafter     84  
Total   $ 916  
Schedule of Participating Mortgage Loans

The following table provides information on the principal balances of mortgage loans serviced for others:

 

    September 30,     December 31,  
(Dollars in thousands)    2017     2016  
FHLMC   $ 511,517     $ 483,356  
FHLB     10,002       11,393  
Total   $ 521,519     $ 494,749  
Schedule of Servicing Asset at Amortized Cost

Activity for mortgage servicing rights and the related valuation allowance follows:

 

    Three months ended September 30,     Nine months ended September 30,  
(Dollars in thousands)    2017     2016     2017     2016  
Mortgage servicing rights:                                
Balance at beginning of period   $ 2,813     $ 2,851     $ 2,849     $ 2,840  
Additions     260       268       702       780  
Amortization     (247 )     (291 )     (725 )     (792 )
Balance at end of period   $ 2,826     $ 2,828     $ 2,826     $ 2,828