Financial Commitments (Narrative) (Details)			1 Months Ended	12 Months Ended
	May 02, 2023	Aug. 18, 2020 USD ($)	Oct. 31, 2022	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 20, 2023	Apr. 01, 2023	Jan. 01, 2022	Apr. 20, 2017 USD ($)
Debt Instrument [Line Items]
Less: current maturities				$ 117,431,000	$ 70,285,000
Amount outstanding				899,745,000	958,439,000
Term Loan B
Debt Instrument [Line Items]
Percentage of principal amount with lenders		89.80%
Less: current maturities				91,000,000	44,000,000
Amount outstanding				$ 357,744,000	$ 404,169,000
Mortgages
Debt Instrument [Line Items]
Term of debt				10 years
Interest rate (as a percent)				2.25%	2.25%
Amount outstanding				$ 8,400,000	$ 11,600,000
Mortgages | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis spread on variable rate				2.00%	2.00%
Equipment Financing Loans
Debt Instrument [Line Items]
Term of debt				5 years
Amount outstanding				$ 26,400,000	$ 37,000,000
Equipment Financing Loans | Minimum
Debt Instrument [Line Items]
Interest rate (as a percent)				2.54%
Equipment Financing Loans | Maximum
Debt Instrument [Line Items]
Interest rate (as a percent)				7.32%
BMO Harris Bank
Debt Instrument [Line Items]
Increase in applicable margin on overdue amounts upon default (as a percent)		2.00%
BMO Harris Bank | Term Loan B
Debt Instrument [Line Items]
Percentage of principal amount with lenders		10.20%
BMO Harris Bank | Unsecured Debt
Debt Instrument [Line Items]
Fixed charge coverage ratio (maximum)		2.00
Credit Agreement 2020 | BMO Harris Bank | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Basis point spread, 1 month interest period	0.11448%
Basis point spread, 3 month interest period	0.26161%
Basis point spread, 6 month interest period	0.42826%
Basis spread on variable rate	10000.00%		10000.00%
Basis spread adjustment (as a percent)			1000.00%
Credit Agreement 2020 | BMO Harris Bank | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate	5000.00%		5000.00%
Credit Agreement 2020 | BMO Harris Bank | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 425,000,000
Fee paid (as percent)						0.50%
Amortization of Debt Issuance Costs				$ 1,700,000
Initial principal amount installment percentage		0.25%
2017 Senior Notes | 2017 Senior Notes
Debt Instrument [Line Items]
Amount outstanding				$ 498,410,000	497,289,000
2017 Senior Notes | 2017 Senior Notes | Private Placement
Debt Instrument [Line Items]
Face amount									$ 500,000,000
Interest rate (as a percent)									6.875%
Redemption price, change of control triggering event (as a percent)				101.00%
2017 Senior Notes | BMO Harris Bank | Line of Credit
Debt Instrument [Line Items]
Remaining maturity (in days)		91 days
First Lien | BMO Harris Bank
Debt Instrument [Line Items]
Net leverage ratio (maximum)		1.35
Term Loan B | BMO Harris Bank | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		4.50%
Term Loan B | BMO Harris Bank | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		4.75%
Term Loan B | BMO Harris Bank | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		3.50%
Term Loan B | BMO Harris Bank | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		3.75%
Credit Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs				$ 1,400,000	1,600,000
Amount outstanding				$ 0	$ 0
Credit Facility | BMO Harris Bank
Debt Instrument [Line Items]
Weighted-average annual interest rate on borrowings (as a percent)				11.80%
Available borrowing capacity				$ 175,000,000
Credit Facility | BMO Harris Bank | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		4.25%
Credit Facility | BMO Harris Bank | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		4.75%
Credit Facility | BMO Harris Bank | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		3.25%
Credit Facility | BMO Harris Bank | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		3.75%
Credit Facility | BMO Harris Bank | Net Leverage Ratio
Debt Instrument [Line Items]
Net leverage ratio (maximum)		2.75	2.75		3.50		2.25	2.25
Credit Facility | BMO Harris Bank | Net Leverage Ratio | Fiscal Quarter March 31, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)				3.75
Credit Facility | BMO Harris Bank | Net Leverage Ratio | Fiscal Quarter June 30, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)				3.00
Credit Facility | BMO Harris Bank | Net Leverage Ratio | Fiscal Quarter September 30, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)				2.50
Credit Facility | BMO Harris Bank | Net Leverage Ratio | Fiscal Quarter December 31, 2023
Debt Instrument [Line Items]
Net leverage ratio (maximum)				2.25
Credit Facility | Credit Agreement 2020 | BMO Harris Bank
Debt Instrument [Line Items]
Increase in line of credit allowed amount		$ 173,500,000
Accordion feature percentage of LTM EBITDA		50.00%
Credit Facility | Credit Agreement 2020 | BMO Harris Bank | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 175,000,000
Letters Of Credit | Credit Agreement 2020 | BMO Harris Bank | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		75,000,000
Bridge Loan | Credit Agreement 2020 | BMO Harris Bank | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 10,000,000
Secured Debt | BMO Harris Bank | Unsecured Debt | Junior Lien
Debt Instrument [Line Items]
Total net leverage ratio (maximum)		3.50