DEBT (Details Narrative) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 item	Oct. 31, 2012
Unsecured Line of Credit Facility [Member]
Short-term Debt [Line Items]
Line of credit maximum borrowing capacity		$ 175,000
Number of anniversaries for optional annual extensions of the credit agreement	3
Period of extension	1 year
Number of options available for calculating variable interest rate	2
Line of credit amount outstanding	0
Letter of Credit [Member]
Short-term Debt [Line Items]
Line of credit maximum borrowing capacity		75,000
Letter of credit amount maintained	35,500
Swingline Credit Facility [Member]
Short-term Debt [Line Items]
Line of credit maximum borrowing capacity		25,000
Line of credit amount outstanding	$ 0