Note 6 - Other Assets and Other Liabilities (Details Textual) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 29, 2023	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($)	Jun. 28, 2024 $ / shares	Dec. 31, 2023 USD ($)
LIHTC Investments		$ 25,787		$ 25,787			$ 28,667
Investment Program, Proportional Amortization Method, Elected, Commitment		$ 12,614		$ 12,614			15,561
Lessee, Operating Lease, Term of Contract		5 years		5 years
Lessee, Operating Lease, Renewal Term (Year)		5 years		5 years
Operating Lease, Right-of-Use Asset		$ 18,832		$ 18,832			$ 18,814
Operating Lease, Weighted Average Remaining Lease Term (Year)		3 years 9 months 18 days		3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent		3.18%		3.18%
Operating Lease, Cost		$ 1,679	$ 1,660	$ 3,357	$ 3,316
Contingent Commitment, Remainder of Fiscal Year [Member]
Investment Program, Proportional Amortization Method, Elected, Commitment		11,130		11,130
Contingent Commitment, Year 1 [Member]
Investment Program, Proportional Amortization Method, Elected, Commitment		600		600
Contingent Commitment, Year 2 [Member]
Investment Program, Proportional Amortization Method, Elected, Commitment		145		145
Contingent Commitment, Year 3 [Member]
Investment Program, Proportional Amortization Method, Elected, Commitment		189		189
Contingent Commitment, Thereafter [Member]
Investment Program, Proportional Amortization Method, Elected, Commitment		$ 550		$ 550
Visa Inc. [Member]
Investment Owned, Balance, Shares | shares		211		211
Conversion Rate of Class B Common Stock into Class A Common Stock	1.5875
Share Price | $ / shares						$ 262.47
Visa Inc. [Member] | Reported Value Measurement [Member]
Investment Owned, Fair Value		$ 0		$ 0