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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2019
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, 2019  
    Gross carrying amount     Accumulated amortization     Net carrying amount  
Core deposit intangible assets   $ 2,018     $ (1,669 )   $ 349  
Lease intangible asset     350       (267 )     83  
Mortgage servicing rights     6,783       (4,381 )     2,402  
Total other intangible assets   $ 9,151     $ (6,317 )   $ 2,834  

 

(Dollars in thousands)   As of December 31, 2018  
    Gross carrying amount     Accumulated amortization     Net carrying amount  
Core deposit intangible assets   $ 2,067     $ (1,588 )   $ 479  
Lease intangible asset     350       (233 )     117  
Mortgage servicing rights     6,545       (4,050 )     2,495  
Total other intangible assets   $ 8,962     $ (5,871 )   $ 3,091  
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 2019 and in successive years ending December 31:

 

(Dollars in thousands)   Amortization  
    expense  
Remainder of 2019   $ 50  
2020     177  
2021     121  
2022     58  
2023     26  
Total   $ 432  
Schedule of Participating Mortgage Loans

Mortgage loans serviced for others are not reported as assets. The following table provides information on the principal balances of mortgage loans serviced for others:

 

(Dollars in thousands)   September 30, 2019     December 31, 2018  
FHLMC   $ 512,167     $ 521,489  
FHLB     28,878       10,603  
Total   $ 541,045     $ 532,092  
Schedule of Servicing Asset at Amortized Cost

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

 

(Dollars in thousands)   Three months ended     Nine months ended  
    September 30,     September 30,  
    2019     2018     2019     2018  
Mortgage servicing rights:                                
Balance at beginning of period   $ 2,372     $ 2,639     $ 2,495     $ 2,811  
Additions     308       150       630       409  
Amortization     (278 )     (214 )     (723 )     (645 )
Balance at end of period   $ 2,402     $ 2,575     $ 2,402     $ 2,575