Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 56,613	$ 50,287
Accounts receivable, net of allowance for doubtful accounts of $265 and $288 at March 31, 2015 and December 31, 2014	64,088	71,982
Inventories	50,451	49,623
Prepaid expenses	3,370	4,545
Deferred income taxes	1,372	1,390
Other current assets	3,233	3,475
Total current assets	179,127	181,302
Property, plant and equipment, net	133,494	131,588
Goodwill	383,906	383,906
Intangible assets with finite lives, net	154,135	160,394
Other assets	4,180	4,341
Total assets	854,842	861,531
Current liabilities:
Trade accounts payable	20,041	24,352
Accrued expenses	16,555	15,614
Accrued compensation and other benefits	4,735	9,137
Dividends payable	0	9,251
Income taxes payable	1,789	2,168
Current portion of long-term debt	35,000	35,000
Total current liabilities	78,120	95,522
Long-term debt	288,750	297,500
Deferred income taxes	70,701	70,661
Other long-term obligations	6,047	5,950
Total liabilities	443,618	469,633
Commitments and contingencies (note 14)
Stockholders' equity:
Preferred stock, $25 par value. Authorized 2,000,000 shares; none issued and outstanding	0	0
Common stock, $.0667 par value. Authorized 60,000,000 shares; 31,056,901 shares issued and outstanding at March 31, 2015 and 30,845,586 shares issued and outstanding at December 31, 2014	2,071	2,058
Additional paid-in capital	104,113	97,289
Retained earnings	310,374	295,202
Accumulated other comprehensive loss	(5,334)	(2,651)
Total stockholders' equity	411,224	391,898
Total liabilities and stockholders' equity	$ 854,842	$ 861,531