Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Domestic and foreign components of income before income taxes
United States	$ 236,507	$ 158,137	$ 133,564
Foreign	18,410	19,532	25,722
Current provision
Federal	49,816	11,337	5,412
State	12,258	7,124	2,117
Foreign	7,485	3,705	4,041
Total	69,559	22,166	11,570
Deferred provision (benefit)
Federal	5,673	28,634	12,645
State	(387)	1,412	(428)
Foreign	(816)	(688)	2,478
Total	$ 4,470	$ 29,358	$ 14,695
Reconciliation of income tax expense compared to the amount of income tax expense that would result by applying U.S. federal statutory income tax rate to pre-tax income
U.S. federal statutory income tax rate (as a percent)	21.00%	21.00%	21.00%
State taxes, net of federal income tax impact (as a percent)	3.70%	3.80%	0.80%
Tax credits (as a percent)	(1.50%)	(0.70%)	(1.90%)
Income taxed at rates greater than U.S. (as a percent)	0.70%	0.20%	0.60%
Nondeductible meals & entertainment (as a percent)	3.40%	3.60%	0.50%
Nondeductible compensation (as a percent)	0.80%	0.70%	0.40%
Capital loss utilization - release of valuation allowance	0.00%	0.00%	(5.80%)
Other items (as a percent)	0.90%	0.40%	0.90%
Value of transferable investment tax credits (ITC) purchased	$ 40,000
Cash paid for transferable investment tax credits (ITC)	$ 36,900
Effective tax rate (as a percent)	29.00%	29.00%	16.50%
Deferred tax assets:
Accrued compensation	$ 12,232	$ 12,044
Accrued workers compensation	3,889	3,103
Net operating losses	34,954	41,819
Disallowed interest		8,227
Lease liabilities	91,933	72,363
Insurance reserves	8,875	6,430
Loss reserves	1,150	1,309
Tax credits	825	748
Capitalized research	14,994	11,522
Other	87	315
Total deferred tax assets	168,939	157,880
Deferred tax liabilities
Depreciation and amortization	(124,395)	(130,051)
Prepaid expense and other	(4,096)	(3,672)
Lease assets	(94,140)	(73,516)
Total deferred tax liabilities	(222,631)	(207,239)
Valuation allowance	(10,343)	(10,206)
Net deferred tax liabilities	(64,035)	(59,565)
Net operating loss carryforward	507,900
Change in valuation allowance	$ (100)
Expiration period for state net operating loss carryforwards (in years)	20 years
Capital loss carryforward	$ 800
Reasonably possible decrease in unrecognized tax benefits	300
Deferred FICA tax payments reserve			$ 21,700	$ 42,000
Income Taxes Receivable			6,300
Deferred Tax Assets, Net of Valuation Allowance	168,939	157,880
Tax Credit Carryforward, Amount	800
Reconciliation and aggregate changes for unrecognized tax benefits
Beginning balance	9,217	10,196	1,337
Increases in balances for tax positions taken during the current year	120	120	120
(Decreases) increases in balances for tax positions taken during prior years		(687)	9,204
Lapse of statute of limitations		(412)	(465)
Total	9,337	9,217	10,196
Interest expense related to uncertain tax positions	$ 700	$ 600	$ 200
Canada
Reconciliation of income tax expense compared to the amount of income tax expense that would result by applying U.S. federal statutory income tax rate to pre-tax income
U.S. federal statutory income tax rate (as a percent)	23.00%
Minimum
Deferred tax liabilities
Tax Credit Carry Forward, Expiration Period	10 years
Maximum
Deferred tax liabilities
Tax Credit Carry Forward, Expiration Period	20 years