Long-Term Debt (Narrative) (Details) - USD ($)				3 Months Ended		6 Months Ended
	Nov. 09, 2023	Mar. 04, 2022	Oct. 07, 2021	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Debt Instrument [Line Items]
Interest expense				$ 700,000	$ 500,000	$ 1,400,000	$ 1,000,000.0
Debt repurchase program, principal reduction amount	$ 300,000,000
Principal retired				29,700,000		93,100,000	0
Current portion of long-term debt				16,599,000		16,599,000		$ 8,575,000
Gain on extinguishment of debt				1,700,000		6,555,000	$ 0
Senior Notes
Debt Instrument [Line Items]
Retired debt, principal				155,700,000		155,700,000
Senior Notes | 2026 Notes
Debt Instrument [Line Items]
Notes payable, fair value				251,300,000		251,300,000		266,000,000
Debt instrument, face amount			$ 305,000,000
Proceeds from issuance of senior long-term debt			$ 301,200,000
Stated interest rate			6.00%
Covenant, leverage ratio, minimum			3.0
Covenant, leverage ratio, maximum			3.0
Covenant, restriction on payments, aggregate amount, maximum			$ 100,000,000
Covenant, earnings before interest, taxes, depreciation, and amortization, maximum			50.00%
Senior Notes | 2028 Notes
Debt Instrument [Line Items]
Notes payable, fair value				362,900,000		362,900,000		$ 422,500,000
Debt instrument, face amount			$ 500,000,000
Proceeds from issuance of senior long-term debt			$ 483,800,000
Stated interest rate			6.50%
Covenant, leverage ratio, minimum			3.0
Covenant, leverage ratio, maximum			3.0
Covenant, restriction on payments, aggregate amount, maximum			$ 100,000,000
Covenant, earnings before interest, taxes, depreciation, and amortization, maximum			50.00%
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 25,000,000
Line of credit facility, accordion feature, increase limit		$ 25,000,000
Long-term line of credit				$ 0		$ 0
Line of Credit | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		1.75%
Line of Credit | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate		2.50%