Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 12,849	$ 32,054
Accounts receivable, net of allowance of $3,738 and $3,529, respectively	236,444	197,990
Inventories, net	176,207	98,307
Prepaid expenses and other current assets	21,467	19,671
Assets of discontinued operations	0	77,438
Total current assets	446,967	425,460
Property, plant, and equipment, net	96,885	89,562
Operating lease assets	18,120	25,229
Goodwill	510,942	514,279
Acquired intangibles	141,504	156,365
Other assets	483	1,599
Total assets	1,214,901	1,212,494
Current liabilities:
Accounts payable	172,286	134,738
Accrued expenses	67,993	83,505
Billings in excess of cost	46,711	34,702
Liabilities of discontinued operations	0	49,295
Total current liabilities	286,990	302,240
Long-term debt	23,781	85,636
Deferred income taxes	40,278	39,057
Non-current operating lease liabilities	11,390	17,730
Other non-current liabilities	27,204	24,026
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 and 50,000 shares in 2021 and 2020; 33,799 and 33,568 shares issued and outstanding in 2021 and 2020	338	336
Additional paid-in capital	314,541	304,870
Retained earnings	545,572	469,943
Accumulated other comprehensive income (loss)	187	(2,461)
Cost of 1,107 and 1,028 common shares held in treasury in 2021 and 2020	(35,380)	(28,883)
Total stockholders’ equity	825,258	743,805
Total liabilities and shareholders' equity	$ 1,214,901	$ 1,212,494