Revolving Credit Facilities (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	May 05, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 06, 2021 USD ($)	Dec. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)
Short-term Debt [Line Items]
Debt instrument, face amount						$ 1
Federal Funds Open Rate
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	0.50%
Federal Funds Open Rate | CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	0.50%
One-Month LIBOR
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.00%
One-Month LIBOR | CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.00%
One-Month LIBOR | Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	0.75%
One-Month LIBOR | Minimum | CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.00%
One-Month LIBOR | Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.75%
One-Month LIBOR | Maximum | CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	2.00%
LIBOR | Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.85%
LIBOR | Minimum | CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	2.10%
LIBOR | Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	2.85%
LIBOR | Maximum | CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	3.10%
Senior Notes due in January 2029 | Debt Instrument, Issuance, Period Two
Short-term Debt [Line Items]
Debt instrument, face amount					$ 500,000
Stated rate, debt instrument					6.00%
Convertible 2.25% Senior Notes Due 2026 | Convertible Debt
Short-term Debt [Line Items]
Debt instrument, face amount						$ 345,000
Stated rate, debt instrument						2.25%
Revolving Credit Facility
Short-term Debt [Line Items]
Debt instrument, face amount							$ 160,000
Maximum borrowing capacity		$ 2,250,000
Elected commitments		$ 1,300,000
Percentage of aggregate commitments available under credit facility	20.00%
Maximum net leverage ratio	3.50
Minimum current ratio	1.00
Borrowings outstanding			$ 192,000
Letters of credit outstanding	$ 171,272		184,131
Borrowings and issuance of letters of credit remaining capacity	1,128,728		923,869
Revolving Credit Facility | CNXM
Short-term Debt [Line Items]
Maximum borrowing capacity				$ 600,000
Borrowings outstanding	153,700		185,000
Letters of credit outstanding	$ 30		30
Interest coverage ratio	2.50
Current borrowing capacity	$ 446,270		$ 414,970
Revolving Credit Facility | Minimum | CNXM
Short-term Debt [Line Items]
Maximum net leverage ratio	5.00
Revolving Credit Facility | Maximum | CNXM
Short-term Debt [Line Items]
Maximum net leverage ratio	5.25
Secured leverage ratio	3.25