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Servicing Assets (Tables)
12 Months Ended
Dec. 31, 2019
Transfers And Servicing Of Financial Assets [Abstract]  
Schedule Of Servicing Assets At Fair Value [Text Block]

The following table presents the changes in servicing rights measured using the fair value method for years ended December 31, 2019, 2018, and 2017:

Year Ended December 31,
201920182017
(In thousands)
Fair value at beginning of year$10,716$9,821$9,858
Servicing from mortgage securitizations or asset transfers1,1741,4811,658
Servicing from portfolio acquired40,463--
Changes due to payments on loans(906)(814)(590)
Changes in fair value due to changes in valuation model inputs or assumptions(668)228(1,105)
Fair value at end of year$50,779$10,716$9,821
Schedule Of Assumptions For Fair Value On Securitization Date Of Interests Continued To Be Held By Transferor Servicing Assets Or Servicing Liabilities [Text Block]

The following table presents key economic assumption ranges used in measuring the mortgage-related servicing asset fair value for the years ended 2019, 2018 and 2017:

Year Ended December 31,
201920182017
Constant prepayment rate4.47% - 18.81%4.30% - 9.02%3.94% - 8.49%
Discount rate10.00% - 15.00%10.00% - 12.00%10.00% - 12.00%
Schedule Of Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Servicing Liabilities [Text Block]

The sensitivity of the current fair value of servicing assets to immediate 10 percent and 20 percent adverse changes in the above key assumptions were as follows:

December 31, 2019
(In thousands)
Mortgage-related servicing asset
Carrying value of mortgage servicing asset$50,779
Constant prepayment rate
Decrease in fair value due to 10% adverse change$(1,085)
Decrease in fair value due to 20% adverse change$(2,131)
Discount rate
Decrease in fair value due to 10% adverse change$(2,079)
Decrease in fair value due to 20% adverse change$(4,012)