CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 72,281	$ 73,411
Accounts receivable, net of allowance for doubtful accounts of $1,783 in 2017 and $1,781 in 2016	72,728	74,416
Inventories	101,650	98,871
Other current assets	10,540	8,744
Total current assets	257,199	255,442
Property, plant and equipment, net	46,647	48,755
Intangible assets, net	73,372	74,828
Goodwill	18,358	17,951
Deferred income taxes	4,099	3,410
Other assets	26,814	26,354
Total assets	426,489	426,740
Current liabilities:
Accounts payable	46,598	47,235
Accrued expenses	27,209	31,549
Current portion of long-term debt	13,504	11,395
Other current liabilities	2,086	2,148
Total current liabilities	89,397	92,327
Long-term liabilities:
Long-term debt	129,473	129,850
Liability for uncertain tax positions	27,788	27,458
Minimum pension obligation and unfunded pension liability	17,205	16,900
Deferred income taxes	1,516	1,460
Other liabilities	282	311
Total liabilities	265,661	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	26,332	27,242
Retained earnings	162,899	161,287
Accumulated other comprehensive loss	(29,604)	(31,297)
Total stockholders' equity	160,828	158,434
Total liabilities and stockholders' equity	426,489	426,740
Class A Common Stock [Member]
Stockholders' Equity:
Common Stock	217	217
Class B Common Stock [Member]
Stockholders' Equity:
Common Stock	$ 984	$ 985