Long-Term Debt - Narrative (Details) T in Billions	1 Months Ended	3 Months Ended				6 Months Ended
	Apr. 30, 2021 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2023 USD ($) T	Jun. 30, 2022 USD ($)	Jun. 26, 2023 USD ($)	Mar. 28, 2023 USD ($)	Dec. 31, 2022 USD ($)	Nov. 30, 2017 USD ($)
Debt Instrument [Line Items]
Number of tons | T						1.4
Assets		$ 2,678,349,000		$ 2,720,486,000		$ 2,678,349,000	$ 2,720,486,000			$ 2,704,377,000
Net Income		167,723,000	$ 230,377,000	126,291,000	$ (4,450,000)	398,100,000	121,841,000
Gain (loss) on extinguishment of debt		688,000		1,565,000		2,063,000	3,687,000
Non-Guarantor Subsidiaries
Debt Instrument [Line Items]
Assets		114,470,000				114,470,000				158,877,000
Accounts receivable, after allowance for credit loss		113,825,000				113,825,000				$ 158,127,000
Net Income		$ 1,986,000		3,407,000		4,608,000	4,092,000
Senior Secured Second Lien Notes due 2025
Debt Instrument [Line Items]
Repayments of debt						$ 77,063,000	26,387,000
PEDFA Solid Waste Disposal Revenue Bonds
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	900.00%	9.00%				9.00%				9.00%
Debt instrument, face amount	$ 75,000,000,000
Debt instrument, term	7 years
Proceeds from issuance of debt	$ 75,000,000
Restricted cash		$ 28,404,000				$ 28,404,000				$ 35,516,000
PEDFA Solid Waste Disposal Revenue Bonds Due April 2028 | Restricted Cash
Debt Instrument [Line Items]
Payment of capital construction project, qualified costs		$ 4,627,000		1,693,000		$ 7,871,000	4,724,000
Senior Notes | Senior Secured Second Lien Notes due 2025
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage		11.00%				11.00%				11.00%	11.00%
Repayments of debt						$ 77,063,000	26,387,000
Debt instrument, repurchased face amount		$ 75,000,000		$ 25,000,000		75,000,000	$ 25,000,000	$ 24,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term line of credit		0				0				$ 0
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		355,000,000				355,000,000			$ 260,000,000		$ 300,000,000
Line of credit facility, maximum borrowing capacity, option to increase, maximum increase amount		45,000,000				45,000,000
Line of credit facility, maximum borrowing capacity, option to increase, maximum amount		400,000,000				400,000,000
Letters of credit outstanding, amount		130,281,000				130,281,000				103,029,000
Line of credit facility, remaining borrowing capacity		$ 224,719,000				$ 224,719,000				$ 296,971,000
Revolving Credit Facility and TLA Facility | Line of Credit
Debt Instrument [Line Items]
Debt instrument, covenant, net leverage ratio, maximum				2.50			2.50
Debt instrument, covenant, fixed charge coverage ratio, minimum				1.10			1.10
Debt instrument, covenant, first lien gross leverage ratio, actual		0.02				0.02
Debt instrument, covenant, net leverage ratio, actual		(0.06)				(0.06)
Debt instrument, covenant, fixed charge coverage ratio, actual		3.54				3.54
Revolving Credit Facility and TLA Facility | Line of Credit | Maximum
Debt Instrument [Line Items]
Debt instrument, covenant, first lien gross leverage ratio				1.50			1.50