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OTHER INTANGIBLE ASSETS (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of changes in other intangible assets
The following table presents changes in our mortgage servicing rights for the periods presented:
 
(Dollars in thousands)Mortgage
Servicing
Rights
Balance as of December 31, 2018$15,596 
Additions1,582 
Amortization(2,460)
Balance as of December 31, 201914,718 
Additions3,314 
Amortization(6,167)
Balance as of December 31, 202011,865 
Additions1,341 
Amortization(3,468)
Balance as of December 31, 2021$9,738 
Schedule of gross carrying value and accumulated amortization related to intangible assets
The gross carrying value, accumulated amortization, and net carrying value related to our mortgage servicing rights as of December 31, 2021 and 2020 are presented below:
 
 December 31, 2021December 31, 2020
(Dollars in thousands)Gross
Carrying
Value		Accumulated
Amortization		Net
Carrying
Value		Gross
Carrying
Value		Accumulated
Amortization		Net
Carrying
Value
Mortgage servicing rights$72,250 $(62,512)$9,738 $70,909 $(59,044)$11,865 
Schedule of estimated amortization expense
Based on our mortgage servicing rights held as of December 31, 2021, estimated amortization expense for the next five succeeding fiscal years and all years thereafter are as follows:
 
(Dollars in thousands)
Year Ending December 31:
2022$1,915 
20231,476 
20241,157 
2025923 
2026745 
Thereafter3,522 
Total$9,738 
Schedule of fair market value and key assumptions used in determining the fair market value of our mortgage servicing rights
The following table presents the fair market value and key assumptions used in determining the fair market value of our mortgage servicing rights:
 
 Year Ended December 31,
(Dollars in thousands)20212020
Fair market value, beginning of period$12,003 $15,820 
Fair market value, end of period10,504 12,003 
Weighted-average discount rate9.5 %9.6 %
Weighted-average prepayment speed assumption19.0 %17.6 %