PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, plant and equipment
Property, plant and equipment, gross	$ 186,489	$ 192,517
Accumulated depreciation	(118,282)	(117,861)
Property, plant and equipment, net	68,207	74,656
Land, buildings and improvements
Property, plant and equipment
Property, plant and equipment, gross	85,175	88,295
Machinery, equipment and fixtures
Property, plant and equipment
Property, plant and equipment, gross	78,829	80,584
Office furniture, equipment and vehicles
Property, plant and equipment
Property, plant and equipment, gross	22,402	23,421
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 83	$ 217