Note 9 - Leases - Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Operating lease	$ 45,987	$ 42,023
Property and equipment, at cost	$ 429,810	$ 413,396
Operating leases (Year)	6 years	6 years
Operating lease accumulated amortization	$ (17,763)	$ (14,297)
Accumulated depreciation	$ (281,478)	$ (266,340)
Finance leases (Year)	3 years	4 years
Operating lease right of use asset, net	$ 28,224	$ 27,726
Operating leases	3.41%	3.44%
Current portion of lease liabilities	$ 6,098	$ 5,940
Finance leases	3.56%	3.42%
Operating lease liabilities	$ 22,655	$ 22,137
Operating Lease, Liability, Total	28,753	28,077
Other Accrued Liabilities [Member]
Finance lease current liabilities	594	661
Other Noncurrent Liabilities [Member]
Finance lease liabilities	1,025	1,115
Other Accrued Liabilities and Other Long-term Liabilities [Member]
Finance Lease, Liability, Total	1,619	1,776
Assets Held Under Finance Leases [Member]
Property and equipment, at cost	3,144	2,710
Accumulated depreciation	(1,585)	(965)
Finance lease, net	$ 1,559	$ 1,745