Note 8 - Taxes on Income (Tax Benefits) (Detail) - Net Deferred Taxes (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred income tax assets:
Foreign tax credit carryforwards	$ 88	$ 483
Net operating loss carryforwards	17,225	14,366
Accrued expenses	10,443	11,015
Other	8,394	8,563
Total gross deferred income tax assets	36,150	34,427
Less valuation allowance	(6,574)	(4,691)	(4,700)
Net deferred income tax assets	29,576	29,736
Deferred income tax liabilities:
Property, plant and equipment	(14,051)	(16,127)
Intangible assets	(33,715)	(27,088)
Undistributed foreign earnings	(7,051)	(7,051)
Other	(8,579)	(11,721)
Total deferred income tax liabilities	(63,396)	(61,987)
Net deferred income tax assets (liabilities)	(33,820)	(32,251)
Current deferred income tax assets, net	3,975	3,728
Current deferred income tax liabilities, net	(5,994)	(3,230)
Noncurrent deferred income tax assets, net	7,989	5,418
Noncurrent deferred income tax liabilities, net	$ (39,790)	$ (38,167)