CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 78,632	$ 77,138
Accounts receivable, net of allowance for doubtful accounts of $1,394 in 2015 and $1,989 in 2014	93,820	99,605
Inventories	111,908	113,630
Other current assets	19,411	20,283
Total current assets	303,771	310,656
Property, plant and equipment, net	67,830	70,661
Intangible assets, net	90,686	95,502
Goodwill	117,678	117,573
Deferred income taxes	9,982	7,933
Other assets	32,965	33,700
Total assets	622,912	636,025
Current Liabilities:
Accounts payable	63,442	61,926
Accrued expenses	36,240	42,588
Current portion of long-term debt	14,781	13,438
Other current liabilities	7,798	3,850
Total current liabilities	122,261	121,802
Long-term Liabilities:
Long-term debt	206,156	219,187
Liability for uncertain tax positions	40,781	39,767
Minimum pension obligation and unfunded pension liability	14,469	14,205
Deferred income taxes	15,358	15,865
Other liabilities	3,901	448
Total liabilities	402,926	411,274
Commitments and contingencies
Stockholders' Equity:
Preferred stock, no par value, 1,000,000 shares authorized; none issued	0	0
Additional paid-in capital	22,348	21,626
Retained earnings	218,660	213,901
Accumulated other comprehensive loss	(22,208)	(11,962)
Total stockholders' equity	219,986	224,751
Total liabilities and stockholders' equity	622,912	636,025
Class A [Member]
Stockholders' Equity:
Common Stock	217	217
Class B [Member]
Stockholders' Equity:
Common Stock	$ 969	$ 969