ACCUMULATED OTHER COMPREHENSIVE LOSS, Components of Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accumulated other comprehensive loss [Abstract]
Foreign currency translation adjustment, net of taxes of ($4) at September 30,2013	$ 1,565		$ 1,565		$ 927
Unrealized holding gains on available-for-sale securities, net of taxes of $140 and $161 as of September 30, 2013 and December 31, 2012	223		223		256
Unfunded SERP liability, net of taxes of ($1,131) and ($1,151) as of September 30, 2013 and December 31, 2012	(2,564)		(2,564)		(2,610)
Accumulated other comprehensive loss	(776)		(776)		(1,427)
Accumulated other comprehensive loss, tax [Abstract]
Foreign currency translation adjustment, tax	212	0	(4)	0
Unrealized holding losses on available-for-sale securities, tax	140		140		161
Unfunded SERP liability, tax	$ (1,131)		$ (1,131)		$ (1,151)