Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 79,902	$ 84,571
Accounts receivable, net of allowance for doubtful accounts of $1,074 and $2,092 at June 30, 2021 and December 31, 2020 respectively	113,782	98,214
Inventories	78,333	70,620
Prepaid expenses	8,140	6,598
Prepaid income taxes	2,520	3,447
Other current assets	4,586	3,438
Total current assets	287,263	266,888
Property, plant and equipment, net	228,289	228,096
Goodwill	527,148	529,463
Intangible assets with finite lives, net	108,253	121,660
Right of use assets	9,575	8,410
Other assets	13,078	11,326
Total assets	1,173,606	1,165,843
Current liabilities:
Trade accounts payable	44,804	23,742
Accrued expenses	39,576	29,655
Accrued compensation and other benefits	13,887	19,753
Dividends payable	203	18,941
Lease liabilities - current	2,289	2,337
Total current liabilities	100,759	94,428
Revolving loan	123,569	163,569
Deferred income taxes	51,883	51,359
Lease liabilities - non-current	7,395	6,079
Derivative liabilities	7,662	11,658
Other long-term obligations	12,696	10,517
Total liabilities	303,964	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; 32,470,829 shares issued and 32,404,774 shares outstanding at June 30, 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	172,635	173,029
Retained earnings	702,882	656,740
Accumulated other comprehensive income	432	4,173
Treasury stock, at cost: 66,055 and 76,084 shares at June 30, 2021 and December 31, 2020, respectively	(8,472)	(7,873)
Total stockholders' equity	869,642	828,233
Total liabilities and stockholders' equity	$ 1,173,606	$ 1,165,843