Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 26, 2021	Mar. 28, 2021
Assets, Current [Abstract]
Cash and cash equivalents	$ 6,802	$ 2,998
Trade accounts receivables, net	90,057	90,603
Inventories	70,338	63,864
Income taxes receivable	0	175
Prepaid expenses and other current assets	2,478	5,367
Total current assets	169,675	163,007
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT, AND EQUIPMENT:	307,021	300,404
Less accumulated depreciation	163,910	155,792
Net property, plant, and equipment	143,111	144,612
Other Assets [Abstract]
Right-of-use assets	11,045	11,630
Goodwill	72,417	70,720
Intangible assets, net of accumulated amortization	73,666	76,368
Other	7,890	6,213
Total other assets	165,018	164,931
Total assets	477,804	472,550
Liabilities, Current [Abstract]
Accounts payable — trade	43,004	37,313
Accrued payroll and employee benefits	12,417	18,048
Income tax payable	877	0
Current portion of long-term debt	9,907	9,907
Short-term lease liability	1,625	1,587
Container deposits	1,528	1,452
Other current liabilities	2,191	2,155
Total current liabilities	71,549	70,462
LONG-TERM DEBT, LESS CURRENT PORTION	73,891	88,845
LONG-TERM LEASE LIABILITY	9,553	10,231
PENSION WITHDRAWAL LIABILITY	4,455	4,631
DEFERRED INCOME TAXES	24,445	24,445
DEFERRED COMPENSATION LIABILITY	8,289	7,322
OTHER LONG-TERM LIABILITIES	1,309	1,368
Total liabilities	193,491	207,304
COMMITMENTS AND CONTINGENCIES	0	0
SHAREHOLDERS’ EQUITY:
Common stock; authorized: 60,000,000 shares of $0.01 par value; 20,888,923 and 20,969,746 shares issued and outstanding as of September 26, 2021 and March 28, 2021, respectively	209	210
Additional paid-in capital	44,801	51,138
Retained earnings	239,303	213,898
Total shareholders’ equity	284,313	265,246
Total liabilities and shareholders’ equity	$ 477,804	$ 472,550