Debt - Derivatives (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 26, 2021	Sep. 14, 2021
Interest rate swap, April 2018, 2.33% fixed
Interest rate swaps
Interest rate swap agreement, notional amount		$ 55.0
Interest rate swap agreement, fixed interest rate		2.33%
Interest rate swap, April 2018, 2.36% fixed
Interest rate swaps
Interest rate swap agreement, notional amount		$ 35.0
Interest rate swap agreement, fixed interest rate		2.36%
Interest rate swap, April 2018, 2.34% fixed
Interest rate swaps
Interest rate swap agreement, notional amount		$ 35.0
Interest rate swap agreement, fixed interest rate		2.34%
Interest rate swap, January 2018, 1.99% fixed, $100 million notional amount
Interest rate swaps
Interest rate swap agreement, notional amount		$ 100.0
Interest rate swap agreement, fixed interest rate		1.99%
Interest rate swap, January 2018, 1.99% fixed, $75 million notional amount
Interest rate swaps
Interest rate swap agreement, notional amount		$ 75.0
Interest rate swap agreement, fixed interest rate		1.99%
Interest rate swap, January 2018, 2.00% fixed, $50 Million notional amount
Interest rate swaps
Interest rate swap agreement, notional amount		$ 50.0
Interest rate swap agreement, fixed interest rate		2.00%
Interest rate swap
Interest rate swaps
Interest rate swap agreement, notional amount		$ 350.0
Notes
Interest rate swaps
Fixed interest rate		3.875%	3.875%
Not designated as a hedge | Interest rate swap
Interest rate swaps
Interest rate swap agreement, notional amount	$ 350.0