Debt - Narrative (Details) - USD ($) $ in Millions	May 31, 2018	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt obligations		$ 508.6	$ 190.1
Deferred debt issuance costs, current		0.4
Deferred debt issuance costs		$ 1.0
Maximum ratio of interest coverage to earnings for the last four fiscal quarters		4.0
Maximum ratio of leverage to earnings for the last four fiscal quarters		3.5
Revolving credit facility with interest at a variable rate (September 30, 2023 - 6.9%; December 31, 2022 - 5.6%)
Debt Instrument [Line Items]
Long-term line of credit outstanding		$ 111.0
Line of credit maximum borrowing capacity		425.0
Line of credit remaining borrowing capacity		314.0
Notes Payable to Banks
Debt Instrument [Line Items]
Long-term debt obligations		411.0
Private Placement
Debt Instrument [Line Items]
Fair value of debt obligations		95.0
Deferred debt issuance costs		0.2
Borrowings		100.0
Term Loan Agreement
Debt Instrument [Line Items]
Borrowings		300.0
Long-term debt, maturities, repayments of principal in next rolling 12 months		15.0
Deferred debt issuance costs		$ 2.5
Fixed-rate notes due in 2025 with an interest rate of 4.2%
Debt Instrument [Line Items]
Borrowings	$ 50.0
Note term	7 years
Interest rate	4.20%	4.20%
Fixed-rate notes due in 2028 with an interest rate of 4.4%
Debt Instrument [Line Items]
Borrowings	$ 50.0
Note term	10 years
Interest rate	4.40%	4.40%