ACCRUED SEVERANCE, SEVERANCE ASSETS AND RETIREMENT PLANS Accrued Severance and Severance Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Postemployment Benefits [Line Items]
Supplemental Unemployment Benefits, Severance - current	$ 151	$ 0
Supplemental Unemployment Benefits, Severance - non-current	4,973	4,491
Supplemental Unemployment Benefits, Severance Benefits	5,124	4,491
Severance liability for employees reaching retirement in next 10 years	2,071	1,777
Severance assets, current	137	0
Severance Assets	3,539	3,165
Severance assets, total	3,676	3,165
Severance assets funded for employees reaching retirement in next 10 years	1,265	1,097
Severance pay contributions to funds expected in next fiscal year	428
Severance pay contributions to dedicated funds	$ 434	$ 347	$ 322