Mortgage Servicing Rights (Tables)

12 Months Ended

Dec. 31, 2020

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,	2020			2019			2018
Balance at beginning of year	$	30.6		$	27.7		$	24.8
Originations of mortgage servicing rights	11.7			7.3			6.0
Amortization expense	(8.0)			(4.4)			(3.1)
Balance at end of year	34.3			30.6			27.7
Less valuation reserve	(10.3)			(0.4)			—
Balance at end of year, net of valuation reserve	$	24.0		$	30.2		$	27.7
Principal balance of serviced loans underlying mortgage servicing rights	$	3,585.5		$	3,710.1		$	3,698.2
Mortgage servicing rights as a percentage of serviced loans	0.67		%	0.81		%	0.75		%