Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 02, 2021	Jun. 26, 2020
Cash flows from operating activities:
Net income	$ 34,635	$ 1,925
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, and amortization	19,063	23,522
Amortization of deferred financing costs in interest expense	364	364
Stock-based compensation expense (non-cash)	3,512	3,966
Deferred income tax expense (benefit)	367	(723)
Impairment charges	0	10,766
Changes in assets and liabilities:
Accounts receivable	(13,941)	5,331
Inventory	(40,651)	(18,446)
Prepaid and other current assets	(1,718)	(7,264)
Accounts payable and accrued expenses	28,403	(7,634)
Unearned revenue	3,246	(257)
Interest and taxes payable	2,868	1,058
Unearned income due to customer prepayments	8,043	26,713
Other-net	(126)	(2,888)
Net cash provided by operating activities	44,065	36,433
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(57,712)	(32,034)
Proceeds from sale of property, plant, and equipment	603	33
Net cash used in investing activities	(57,109)	(32,001)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit agreement, net	22,500	150,000
Repayment of long-term debt	(1,654)	(428)
Principal payments under finance lease obligations	(1,512)	(626)
Cash dividends paid	(4,791)	(4,582)
Repurchase of common stock	0	(6,766)
Payments of withholding taxes for stock-based compensation awards	(3,021)	(2,025)
Net cash provided by financing activities	11,522	135,573
Effects of exchange rate changes	(11)	56
Net change in cash and cash equivalents	(1,533)	140,061
Cash and cash equivalents at beginning of period	25,878	125,007
Cash and cash equivalents at end of period	$ 24,345	$ 265,068