Mortgage Servicing Rights (Tables)

12 Months Ended

Dec. 31, 2022

Transfers and Servicing [Abstract]

Schedule of Servicing Assets at Amortized Value

Information with respect to the Company’s mortgage servicing rights follows:

Year Ended December 31,	2022			2021			2020
Balance at beginning of year	$	31.6		$	34.3		$	30.6
Acquisition of mortgage servicing rights	1.3			—			—
Originations of mortgage servicing rights	2.5			3.7			11.7
Amortization expense	(4.3)			(6.4)			(8.0)
Balance at end of year	31.1			31.6			34.3
Less valuation reserve	—			(3.4)			(10.3)
Balance at end of year, net of valuation reserve	$	31.1		$	28.2		$	24.0
Principal balance of serviced loans underlying mortgage servicing rights	$	3,259.8		$	3,203.7		$	3,585.5
Mortgage servicing rights as a percentage of serviced loans	0.95		%	0.88		%	0.67		%