ACCUMULATED OTHER COMPREHENSIVE LOSS, Components of Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accumulated other comprehensive loss [Abstract]
Foreign currency translation adjustment	$ (486)	$ 927
Unrealized holding losses on available-for-sale securities, net of taxes of $213 and $161 as of March 31, 2013 and December 31, 2012	341	256
Unfunded SERP liability, net of taxes of ($1,178) and ($1,151) as of March 31, 2013 and December 31, 2012	(2,671)	(2,610)
Accumulated other comprehensive loss	(2,816)	(1,427)
Accumulated other comprehensive loss, tax [Abstract]
Unrealized holding losses on available-for-sale securities, tax	213	161
Unfunded SERP liability, tax	$ (1,178)	$ (1,151)