RETIREMENT EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Expenses associated with management retirements	$ 2,965
Stock-based compensation	894	3,401	4,443	3,397
Former President and Chief Executive Officer
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Expenses associated with management retirements	2,965
Stock-based compensation	$ 894