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Residential Mortgage Servicing Rights
 9 Months Ended
Sep. 30, 2022
Transfers and Servicing [Abstract]  
Residential Mortgage Servicing Rights Residential Mortgage Servicing Rights 
 
The Company measures its MSR asset at fair value with changes in fair value reported in residential mortgage banking revenue, net. The following table presents the changes in the Company's residential MSR for the three and nine months ended September 30, 2022 and 2021: 
Three Months EndedNine Months Ended
 (in thousands) September 30, 2022September 30, 2021September 30, 2022September 30, 2021
Balance, beginning of period$179,558 $102,699 $123,615 $92,907 
Additions for new MSR capitalized5,194 8,450 20,397 30,845 
Changes in fair value:    
Changes due to collection/realization of expected cash flows over time(4,978)(4,681)(15,286)(13,592)
Changes due to valuation inputs or assumptions (1)
16,403 (634)67,451 (4,326)
Balance, end of period$196,177 $105,834 $196,177 $105,834 
(1) The change in valuation inputs and assumptions principally reflect changes in discount rates and prepayment speeds, which are primarily affected by changes in interest rates.
Information related to the serviced loan portfolio as of September 30, 2022 and December 31, 2021 is as follows: 
(dollars in thousands)September 30, 2022December 31, 2021
Balance of loans serviced for others$12,997,911 $12,755,671 
MSR as a percentage of serviced loans1.51 %0.97 %
 
The amount of contractually specified servicing fees, late fees, and ancillary fees earned, which are recorded in residential mortgage banking revenue, were $9.5 million and $28.2 million for the three and nine months ended September 30, 2022, respectively, as compared to $9.2 million and $27.4 million for the three and nine months ended September 30, 2021, respectively.