ACCUMULATED OTHER COMPREHENSIVE LOSS, Components of Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Accumulated other comprehensive loss [Abstract]
Foreign currency translation adjustment, net of taxes of ($216) at June 30,2013	$ (255)		$ (255)		$ 927
Unrealized holding gains on available-for-sale securities, net of taxes of $150 and $161 as of June 30, 2013 and December 31, 2012	238		238		256
Unfunded SERP liability, net of taxes of ($1,154) and ($1,151) as of June 30, 2013 and December 31, 2012	(2,618)		(2,618)		(2,610)
Accumulated other comprehensive loss	(2,635)		(2,635)		(1,427)
Accumulated other comprehensive loss, tax [Abstract]
Foreign currency translation adjustment, tax	5	0	(216)	0
Unrealized holding losses on available-for-sale securities, tax	150		150		161
Unfunded SERP liability, tax	$ (1,154)		$ (1,154)		$ (1,151)