Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 244,935	$ 271,749
Accounts receivable, net of allowance for doubtful accounts of $908 and $788, respectively	381,998	355,883
Contract assets	168,675	155,243
Inventories	608,347	523,240
Prepaid expenses and other assets	47,061	41,688
Income taxes receivable	2	341
Total current assets	1,451,018	1,348,144
Property, plant and equipment, net	190,526	186,666
Operating lease right-of-use assets	92,423	99,158
Goodwill	192,116	192,116
Deferred income taxes	6,352	5,972
Other assets, net	70,121	71,824
Total assets	2,002,556	1,903,880
Current liabilities:
Current installments of long-term debt	1,808	985
Accounts payable	457,252	426,555
Advance payments from customers	129,600	118,124
Income taxes payable	6,089	6,164
Accrued liabilities	89,716	102,554
Total current liabilities	684,465	654,382
Long-term debt, less current installments	201,510	129,289
Operating lease liabilities	85,024	90,878
Other long-term liabilities	55,068	55,445
Deferred income taxes	84	84
Commitments and contingencies
Shareholders’ equity:
Preferred stock, $0.10 par value; 5,000 shares authorized, none issued
Common stock, $0.10 par value; 145,000 shares authorized; issued and outstanding 35,261 and 35,213, respectively	3,526	3,521
Additional paid-in capital	506,714	507,447
Retained earnings	482,052	479,992
Accumulated other comprehensive loss	(15,887)	(17,158)	$ (16,651)
Total shareholders’ equity	$ 976,405	$ 973,802