ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accumulated other comprehensive loss [Abstract]
Foreign currency translation adjustment, net of taxes of ($792) at September 30, 2016 and ($336) at December 31, 2015		$ (22,504)		$ (22,504)		$ (19,305)
Unrealized holding gains on available-for-sale securities, net of taxes of $339 at September 30, 2016 and $265 at December 31, 2015		546		546		434
Unfunded SERP liability, net of taxes of ($1,191) at September 30, 2016 and ($1,327) at December 31, 2015		(2,439)		(2,439)		(3,005)
Accumulated other comprehensive loss		(24,397)		(24,397)		(21,876)	[1]
Accumulated other comprehensive loss, tax [Abstract]
Foreign currency translation adjustment, tax		(792)		(792)		(336)
Unrealized holding gains on available-for-sale securities, tax		339		339		265
Unfunded SERP liability, tax		(1,191)		(1,191)		$ (1,327)
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period	[1]			233,122
Other comprehensive income before reclassifications				(2,718)
Amount reclassified from accumulated other comprehensive loss				197
Net current period other comprehensive (loss) income		(77)	$ (1,465)	(2,521)	$ (8,113)
Balance at end of period		161,996		161,996
AOCI Attributable to Parent [Member]
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period				(21,876)
Balance at end of period		(24,397)		(24,397)
Foreign Currency Translation Adjustment [Member]
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period				(19,305)
Other comprehensive income before reclassifications				(3,199)
Amount reclassified from accumulated other comprehensive loss				0
Net current period other comprehensive (loss) income				(3,199)
Balance at end of period		(22,504)		(22,504)
Unrealized Holding Gains on Available-for-Sale Securities [Member]
Changes in Accumulated Other Comprehensive Loss by Component [Roll Forward]
Balance at beginning of period				434
Other comprehensive income before reclassifications				112
Amount reclassified from accumulated other comprehensive loss				0
Net current period other comprehensive (loss) income				112
Balance at end of period		546		546
Unfunded SERP Liability [Member]
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	[2]			197
Net current period other comprehensive (loss) income				566
Balance at end of period		$ (2,439)		$ (2,439)

[1] (Revised)

[2] 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.