Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 88,535	$ 84,571
Accounts receivable, net of allowance for doubtful accounts of $2,158 and $2,092 at March 31, 2021 and December 31, 2020 respectively	106,806	98,214
Inventories	77,022	70,620
Prepaid expenses	4,995	6,598
Prepaid income taxes	0	3,447
Other current assets	3,846	3,438
Total current assets	281,204	266,888
Property, plant and equipment, net	226,513	228,096
Goodwill	526,246	529,463
Intangible assets with finite lives, net	113,659	121,660
Right of use assets	8,708	8,410
Other assets	12,885	11,326
Total assets	1,169,215	1,165,843
Current liabilities:
Trade accounts payable	33,765	23,742
Accrued expenses	37,400	29,655
Accrued compensation and other benefits	11,474	19,753
Dividends payable	203	18,941
Income taxes payable	3,639	0
Lease liabilities - current	2,282	2,337
Total current liabilities	88,763	94,428
Revolving loan	153,569	163,569
Deferred income taxes	51,865	51,359
Lease liabilities - non-current	6,423	6,079
Derivative liabilities	6,758	11,658
Other long-term obligations	12,345	10,517
Total liabilities	319,723	337,610
Commitments and contingencies (Note 15)
Stockholders' equity:
Preferred stock, $25 par value. Authorized 2,000,000 shares; none issued and outstanding	0	0
Common stock, $0.0667 par value. Authorized 120,000,000 shares; 32,471,019 shares issued and 32,451,930 shares outstanding at March 31, 2021 and 32,448,705 shares issued and 32,372,621 outstanding at December 31, 2020, respectively	2,165	2,164
Additional paid-in capital	170,837	173,029
Retained earnings	680,151	656,740
Accumulated other comprehensive (loss) income	(1,451)	4,173
Treasury stock, at cost: 19,089 and 76,084 shares at March 31, 2021 and December 31, 2020, respectively	(2,210)	(7,873)
Total stockholders' equity	849,492	828,233
Total liabilities and stockholders' equity	$ 1,169,215	$ 1,165,843