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Debt
 12 Months Ended
Dec. 29, 2023
Debt Disclosure [Abstract]  
Debt Debt
A summary of debt follows (dollars in thousands):
Average Interest Rate as of
December 29, 2023Maturity20232022
Private placement unsecured fixed-rate notes
Series D5.35%July 2023— 75,000 
Unsecured revolving credit facilityN/ADecember 2026— — 
Unsecured revolving credit facility - offshore renminbi denominated3.79%N/A28,099 14,327 
Notes payable to banks—%20241,937 6,647 
Total debt$30,036 $95,974 

The estimated fair value of the fixed interest rate Series D private placement debt was $75 million on December 30, 2022. This debt was repaid in July of 2023. The fair value of variable rate borrowings approximates carrying value. The Company uses significant other observable inputs to estimate fair value (level 2 of the fair value hierarchy) based on the present value of future cash flows and rates that would be available for issuance of debt with similar terms and remaining maturities.

On May 23, 2023 and June 8, 2023, the Company executed amendments to its amended and restated credit agreement that amended, superseded and restated in its entirety the Company's existing credit agreement with U.S. Bank National Association, as administrative agent and a lender, and the other lenders that are parties thereto. The first amendment removed references to LIBOR for calculating rates and replaced them with SOFR and its equivalent benchmark rates such as EURIBOR, TIBOR and RFR loans.
The second amendment increased, from $500 million to $750 million, the amount of availability under an unsecured revolving credit facility, as well as increased, from $200 million to $375 million, the maximum amount of outstanding loans in currencies other than U.S. dollars. The amendment also increased, from $250 million to $375 million, the amount by which the size of the credit facility may be increased upon exercise of an accordion feature. The accordion feature may be exercised by means of an increase in the revolving commitments or the addition of term loans.
In addition, the second amendment increased the applicable margin percentages used for purposes of calculating the interest rates applicable to base rate loans and non-base rate loans (e.g., SOFR, EURIBOR, TIBOR and RFR loans). Under the amendment, the applicable margin percentages for base rate loans (which ranged from 0.000% to 0.750% under the prior credit agreement) range from 0.125% to 0.875%, and the applicable margin percentages for non-base rate loans (which ranged from 1.000% to 1.750% under the prior credit agreement) range from 1.125% to 1.875%.

Borrowings under the amended and restated credit agreement may be denominated in U.S. dollars or certain other currencies. In addition to paying interest on the outstanding loans, the Company is required to pay a facility fee on the unused amount of the loan commitments at a rate per annum ranging from 0.125% to 0.25%, depending on the Company’s cash flow leverage ratio.
The amended and restated credit agreement contains customary representations, warranties, covenants and events of default, including but not limited to covenants restricting the Company’s and its subsidiaries’ ability to (i) merge or consolidate with another entity, (ii) sell, transfer, lease or convey their assets, (iii) make any material change in the nature of the core business of the Company, (iv) make certain investments, or (v) incur secured indebtedness. The amended and restated credit agreement also requires the Company to maintain a cash flow leverage ratio of not more than 3.50 to 1.00 (unless a significant acquisition has been consummated, in which case, not more than 4.00 to 1.00 during the four fiscal quarter period beginning with the quarter in which such acquisition occurs) and an interest coverage ratio of not less than 3.00 to 1.00 (unless a significant acquisition has been consummated, in which case, not less than 2.50 to 1.00 during the four fiscal quarter period beginning with the quarter in which such acquisition occurs). A change in control of the Company will constitute an event of default under the amended and restated credit agreement.

The Company maintains a revolving credit agreement with a sole lender that provides up to $50 million of committed credit, available for general corporate purposes, working capital needs, share repurchases and acquisitions. Under the terms of the agreement, loans may be denominated in U.S. dollars or Chinese renminbi (offshore). Loans denominated in U.S. dollars bear interest, at the Company’s option, at either a base rate or a HIBOR-based rate. Loans denominated in Chinese renminbi (offshore) bear interest at a HIBOR-based rate based on the Chinese offshore rate. Other terms of this revolving credit agreement are substantially similar to those of the Company’s amended and restated credit agreement that expires in March 2026.
On December 16, 2022, the Company entered into an amendment to its master note agreement that extends the period in which the Company may issue, and affiliates of the lender may purchase, the Company’s senior notes from January 29, 2023 to December 16, 2027. The amendment also increases the maximum aggregate principal amount of senior notes the Company may issue under the master note agreement from $200 million to $250 million, although the maximum aggregate amount of senior notes bearing interest at a floating rate that may be outstanding at any one time will continue to be $100 million. The amendment also extends the maturity and average life of each senior note bearing interest at a fixed rate that may be issued under the master note agreement from no more than 12 years after the date of issuance to no more than 15 years after the date of issuance, and includes customary provisions for the replacement of LIBOR with SOFR and customary benchmark replacement provisions with respect to senior notes bearing interest at a floating rate. All other material items of the master note agreement remain unchanged. Under the terms of the master note agreement, the Company is required to maintain certain financial ratios as to cash flow leverage and interest coverage similar to the requirements of its other debt agreements.

On December 29, 2023, the Company had $842 million in lines of credit, including the $800 million in committed credit facilities described above and $42 million with foreign banks. The unused portion of committed credit lines was $775 million as of December 29, 2023. In addition, the Company has unused, uncommitted lines of credit with foreign banks totaling $24 million. Borrowing rates under these credit lines vary with the prime rate, rates on domestic certificates of deposit and other benchmark rates (e.g. SOFR, EURIBOR, HIBOR, TIBOR and RFR). The Company pays facility fees at an annual rate of up to 0.15% on certain of these lines. No compensating balances are required.

Various debt agreements require the Company to maintain certain financial ratios as to cash flow leverage and interest coverage. The Company is in compliance with all financial covenants of its debt agreements as of December 29, 2023.

Annual maturities of debt are as follows (in thousands):
20242025202620272028Thereafter
Maturities of debt$30,036 $— $— $— $— $— 

Interest paid on debt was $5.7 million in 2023, $10.0 million in 2022 and $9.8 million in 2021.