Note 2 - Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accumulated depreciation and amortization	$ (858,405)	$ (799,989)
Total	1,488,086	1,368,594
Land [Member]
Property and equipment, gross	172,396	162,641
Building and Building Improvements [Member]
Property and equipment, gross	$ 591,992	570,595
Building and Building Improvements [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	10 years
Building and Building Improvements [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	39 years
Leasehold Improvements [Member]
Property and equipment, gross	$ 43,088	42,236
Leasehold Improvements [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	2 years
Leasehold Improvements [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	39 years
Machinery and Equipment [Member]
Property and equipment, gross	$ 105,544	96,584
Machinery and Equipment [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	20 years
Furniture and Fixtures [Member]
Property and equipment, gross	$ 111,242	98,609
Furniture and Fixtures [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	15 years
Transportation Equipment [Member]
Property and equipment, gross	$ 135,425	116,327
Transportation Equipment [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	3 years
Transportation Equipment [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	15 years
Vehicles [Member]
Property and equipment, gross	$ 1,155,767	1,067,006
Vehicles [Member] | Minimum [Member]
Property and equipment, estimated life (Year)	1 year
Vehicles [Member] | Maximum [Member]
Property and equipment, estimated life (Year)	8 years
Construction in Progress [Member]
Property and equipment, gross	$ 31,037	$ 14,585