Note 9 - Leases - Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating lease	$ 56,117	$ 45,987
Operating lease accumulated amortization	(21,737)	(17,763)
Operating lease right of use asset, net	(34,380)	(28,224)
Current portion of lease liabilities	7,813	6,098
Operating lease, operating lease liabilities	27,261	22,655
Operating Lease, Liability	35,074	28,753
Property and equipment, at cost	483,448	429,810
Accumulated depreciation	(297,340)	(281,478)
Finance Lease, Liability	$ 3,193	$ 1,619
Operating leases (Year)	6 years	6 years
Finance leases (Year)	4 years	3 years
Operating leases	4.07%	3.41%
Finance leases	5.06%	3.56%
Other Accrued Liabilities [Member]
Finance lease current liabilities	$ 1,087	$ 594
Other Noncurrent Liabilities [Member]
Finance lease liabilities	2,106	1,025
Assets Held Under Finance Leases [Member]
Property and equipment, at cost	5,686	3,144
Accumulated depreciation	(2,615)	(1,585)
Finance lease, net	$ 3,071	$ 1,559