CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 62,106	$ 73,411
Accounts receivable, net of allowance for doubtful accounts of $1,689 in 2017 and $1,781 in 2016	83,643	74,416
Inventories	104,522	98,871
Other current assets	9,231	8,744
Total current assets	259,502	255,442
Property, plant and equipment, net	43,664	48,755
Intangible assets, net	70,886	74,828
Goodwill	20,028	17,951
Deferred income taxes	6,511	3,410
Other assets	27,897	26,354
Total assets	428,488	426,740
Current liabilities:
Accounts payable	45,493	47,235
Accrued expenses	29,816	31,549
Current portion of long-term debt	15,551	11,395
Other current liabilities	6,751	2,148
Total current liabilities	97,611	92,327
Long-term liabilities:
Long-term debt	105,479	129,850
Liability for uncertain tax positions	27,540	27,458
Minimum pension obligation and unfunded pension liability	17,770	16,900
Deferred income taxes	1,670	1,460
Other liabilities	323	311
Total liabilities	250,393	268,306
Commitments and contingencies
Stockholders' Equity:
Preferred stock, no par value, 1,000,000 shares authorized; none issued	0	0
Additional paid-in capital	27,856	27,242
Retained earnings	169,402	161,287
Accumulated other comprehensive loss	(20,366)	(31,297)
Total stockholders' equity	178,095	158,434
Total liabilities and stockholders' equity	428,488	426,740
Class A Common Stock [Member]
Stockholders' Equity:
Common Stock	217	217
Class B Common Stock [Member]
Stockholders' Equity:
Common Stock	$ 986	$ 985