Subsequent Events (Details)	Oct. 09, 2023 Vote $ / shares shares	Jul. 11, 2023 USD ($)	Oct. 27, 2021 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jul. 12, 2017
Subsequent Events
Debt instrument face amount exchanged			$ 912,700,000
Outstanding debt				$ 1,064,377,000	$ 1,096,837,000
2023 notes
Subsequent Events
Interest rate (in percent)						10.00%
Debt instrument face amount exchanged			$ 91.3
Outstanding debt				$ 9,000,000.0
Subsequent Events | GP-HGM LLC | Special Voting Preferred Stock
Subsequent Events
Shares issued | shares	1,000,000
Stock issue price per share | $ / shares	$ 100
Redemption price | $ / shares	$ 100
Number of votes per share | Vote	20,000
Subsequent Events | New Notes
Subsequent Events
Interest rate (in percent)		11.50%
Face amount issued to affiliates		$ 314,400,000
Debt instrument face amount exchanged		764,800,000
Outstanding debt		$ 24,000,000.0
Percentage of interest paid in cash		50.00%
Amount of minimum unrestricted cash remaining after the interest payment		$ 15,000,000
Exchange offer per $1,000 of principal amount		$ 800
Redemption Price		100.00%
Debt instrument, redemption price percentage		101.00%
Aggregate purchase price		$ 767,800,000
Subsequent Events | Old Notes
Subsequent Events
Outstanding debt		956,000,000.0
Subsequent Events | Senior Term Loan
Subsequent Events
Aggregate purchase price		40,000,000.0
Subsequent Events | 2023 notes
Subsequent Events
Debt instrument face amount exchanged		3,000,000.0
Outstanding debt		$ 0