Note D - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating lease cost	$ 1,581	$ 2,119
Amortization of right-of-use assets	46	49
Interest on lease liabilities	5	7
Total Finance lease cost	51	56
Variable lease cost	539	920
Sublease income	(251)	(171)
Total lease cost, net	1,920	2,924
Operating cash flows from operating leases	3,789	3,950
Operating cash flows from finance leases	4	7
Financing cash flows from finance leases	$ 55	$ 56
Weighted Average Remaining Lease term, Operating leases (Year)	6 years 2 months 12 days	5 years 9 months 18 days
Weighted Average Remaining Lease term, Finance leases (Year)	2 years	2 years 9 months 18 days
Weighted Average Discount Rate, Operating leases	3.41%	3.58%
Weighted Average Discount Rate, Finance leases	5.47%	5.30%