Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 7,497	$ 17,608
Accounts receivable, net of allowance of $4,164 and $3,746, respectively	230,132	217,156
Inventories, net	171,634	170,360
Prepaid expenses and other current assets	19,015	18,813
Total current assets	428,278	423,937
Property, plant, and equipment, net	107,701	109,584
Operating lease assets	24,432	26,502
Goodwill	512,639	512,363
Acquired intangibles	134,735	137,526
Other assets	707	701
Total assets	1,208,492	1,210,613
Current liabilities:
Accounts payable	129,661	106,582
Accrued expenses	67,103	73,721
Billings in excess of cost	42,929	35,017
Total current liabilities	239,693	215,320
Long-term debt	49,876	88,762
Deferred income taxes	47,030	47,088
Non-current operating lease liabilities	17,488	19,041
Other non-current liabilities	19,018	18,303
Stockholders’ equity:
Preferred stock, $0.01 par value; authorized 10,000 shares; none outstanding	0	0
Common stock, $0.01 par value; authorized 100,000 shares; 34,148 and 34,060 shares issued and outstanding in 2023 and 2022	341	340
Additional paid-in capital	324,466	322,873
Retained earnings	649,077	627,978
Accumulated other comprehensive loss	(3,539)	(3,432)
Cost of 3,389 and 3,199 common shares held in treasury in 2023 and 2022	(134,958)	(125,660)
Total stockholders’ equity	835,387	822,099
Total liabilities and shareholders' equity	$ 1,208,492	$ 1,210,613