Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 17,149	$ 12,849
Accounts receivable, net of allowance of $3,901 and $3,738, respectively	275,596	236,444
Inventories, net	197,499	176,207
Prepaid expenses and other current assets	39,333	21,467
Total current assets	529,577	446,967
Property, plant, and equipment, net	100,998	96,885
Operating lease assets	26,206	18,120
Goodwill	509,357	510,942
Acquired intangibles	128,725	141,504
Other assets	550	483
Total assets	1,295,413	1,214,901
Current liabilities:
Accounts payable	160,058	172,286
Accrued expenses and other current liabilities	77,606	67,993
Billings in excess of cost	65,864	46,711
Total current liabilities	303,528	286,990
Long-term debt	93,454	23,781
Deferred income taxes	40,150	40,278
Non-current operating lease liabilities	19,252	11,390
Other non-current liabilities	21,751	27,204
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 in 2022 and 2021; 33,989 shares and 33,799 shares issued and outstanding in 2022 and 2021	340	338
Additional paid-in capital	318,664	314,541
Retained earnings	590,335	545,572
Accumulated other comprehensive (loss) income	(3,213)	187
Treasury stock, at cost, 2,374 and 1,107 shares in 2022 and 2021	(88,848)	(35,380)
Total stockholders’ equity	817,278	825,258
Total liabilities and shareholders' equity	$ 1,295,413	$ 1,214,901