Summary of Significant Accounting Policies - Schedule of Variable Interest Entities (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024 USD ($) variableInterestEntity	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) variableInterestEntity	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) variableInterestEntity
Accounting Policies [Abstract]
Number of Consolidated Variable Interest Entities | variableInterestEntity		9		9		9
Variable Interest Entity [Line Items]
Total assets	[1]	$ 4,800,014		$ 4,800,014		$ 4,731,558
Current installments of long-term debt	[1]	12,167		12,167		18,605
Accounts payable	[1]	368,850		368,850		474,543
Accrued salaries and benefits	[1]	255,370		255,370		267,685
Other accrued expenses and liabilities	[1]	250,945		250,945		233,271
Total current liabilities	[1]	887,332		887,332		994,104
Long-term debt, less current maturities	[1]	1,083,725		1,083,725		1,168,253
Self-insured liabilities	[1]	231,951		231,951		243,552
Other long-term liabilities	[1]	53,686		53,686		76,002
Total liabilities	[1]	3,413,145		3,413,145		3,649,242
Income before income taxes		57,067	$ 45,969	195,814	$ 142,787
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Total assets		1,200,000		1,200,000		1,200,000
Current installments of long-term debt		2,222		2,222		2,386
Accounts payable		86,521		86,521		103,274
Accrued salaries and benefits		32,480		32,480		34,730
Other accrued expenses and liabilities		48,116		48,116		53,684
Total current liabilities		169,339		169,339		194,074
Long-term debt, less current maturities		7,679		7,679		8,044
Self-insured liabilities		659		659		651
Other long-term liabilities		4,606		4,606		5,437
Total liabilities		303,181		303,181		337,782
Income before income taxes		68,600	$ 60,300	207,000	$ 198,400
Nonrelated Party
Variable Interest Entity [Line Items]
Long-term operating lease liability	[1]	233,786		233,786		235,241
Nonrelated Party | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Long-term operating lease liability		111,449		111,449		120,056
Related Party
Variable Interest Entity [Line Items]
Long-term operating lease liability	[1]	922,665		922,665		932,090
Related Party | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Long-term operating lease liability		$ 9,449		$ 9,449		$ 9,520

[1] As of September 30, 2024 and December 31, 2023, the unaudited condensed consolidated balance sheets included total liabilities of consolidated variable interest entities of $303.2 million and $337.8 million, respectively. Refer to Note 2, Summary of Significant Accounting Policies, for further discussion.