Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 54,268	$ 40,416
Accounts receivable, net of allowance for doubtful accounts of $610 and $431 at December 31, 2018 and 2017, respectively	99,545	91,226
Inventories	67,187	60,696
Prepaid expenses	3,830	4,774
Other current assets	1,484	2,224
Total current assets	226,314	199,336
Property, plant and equipment, net	194,339	189,793
Goodwill	447,995	441,361
Intangible assets with finite lives, net	105,985	128,073
Other assets	6,722	5,073
Total assets	981,355	963,636
Current liabilities:
Trade accounts payable	33,789	28,451
Accrued expenses	22,025	22,930
Accrued compensation and other benefits	11,022	8,531
Dividends payable	15,220	13,484
Current portion of long-term debt	0	35,000
Total current liabilities	82,056	108,396
Long-term debt	0	183,964
Revolver loan - long-term	156,000	0
Deferred income taxes	44,309	48,548
Other long-term obligations	7,372	5,847
Total liabilities	289,737	346,755
Commitments and contingencies (note 16)
Stockholders’ equity:
Preferred stock, $25 par value. Authorized 2,000,000 shares; none issued and outstanding	0	0
Common stock, $.0667 par value. Authorized 120,000,000 shares; 32,256,915 shares issued and 32,256,209 outstanding at December 31, 2018 and 32,019,605 shares issued and outstanding at December 31, 2017	2,151	2,135
Additional paid-in capital	165,098	151,749
Retained earnings	528,027	464,639
Accumulated other comprehensive loss	(3,602)	(1,642)
Treasury stock, at cost: 706 and 0 shares at December 31, 2018 and 2017, respectively	(56)	0
Total stockholders’ equity	691,618	616,881
Total liabilities and stockholders’ equity	$ 981,355	$ 963,636