ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Accumulated other comprehensive loss [Abstract]
Foreign currency translation adjustment, net of taxes of ($336) at March 31, 2016 and ($336) at December 31, 2015			$ (18,277)	$ (19,305)
Unrealized holding gains on available-for-sale securities, net of taxes of $292 at March 31, 2016 and $265 at December 31, 2015			478	434
Unfunded SERP liability, net of taxes of ($1,295) at March 31, 2016 and ($1,327) at December 31, 2015			(2,570)	(3,005)
Accumulated other comprehensive loss		$ (21,876)	(20,369)	(21,876)
Accumulated other comprehensive loss, tax [Abstract]
Foreign currency translation adjustment, tax			(336)	(336)
Unrealized holding gains on available-for-sale securities, tax			292	265
Unfunded SERP liability, tax			(1,255)	(1,327)
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period		(21,876)
Other comprehensive income before reclassifications		1,441
Amount reclassified from accumulated other comprehensive loss		66
Net current period other comprehensive income		1,507
Balance at end of period		(20,369)
Foreign Currency Translation Adjustment [Member]
Accumulated other comprehensive loss [Abstract]
Accumulated other comprehensive loss		(19,305)	(18,277)	(19,305)
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period		(19,305)
Other comprehensive income before reclassifications		1,028
Amount reclassified from accumulated other comprehensive loss		0
Net current period other comprehensive income		1,028
Balance at end of period		(18,277)
Unrealized Holding Gains on Available-for-Sale Securities [Member]
Accumulated other comprehensive loss [Abstract]
Accumulated other comprehensive loss		434	478	434
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period		434
Other comprehensive income before reclassifications		44
Amount reclassified from accumulated other comprehensive loss		0
Net current period other comprehensive income		44
Balance at end of period		478
Unfunded SERP Liability [Member]
Accumulated other comprehensive loss [Abstract]
Accumulated other comprehensive loss		(3,005)	$ (2,570)	$ (3,005)
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period		(3,005)
Other comprehensive income before reclassifications		369
Amount reclassified from accumulated other comprehensive loss	[1]	66
Net current period other comprehensive income		435
Balance at end of period		$ (2,570)

[1] This reclassification relates to the amortization of prior service costs and gains/losses associated with the Company's SERP plan.This expense is allocated between cost of sales and selling, general and administrative expense based upon the employment classification of the plan participants.