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COMMITMENTS AND CONTINGENCIES - Litigation and Other Legal Matters (Details)
$ in Millions
Mar. 13, 2014
lawsuit
May. 09, 2012
USD ($)
plaintiff
Dec. 31, 2015
USD ($)
Shareholder Lawsuits      
LITIGATION AND OTHER LEGAL MATTERS      
Class actions filed | lawsuit 2    
Iroquois Lawsuit      
LITIGATION AND OTHER LEGAL MATTERS      
Number of plaintiffs which filed lawsuit | plaintiff   5  
Damages sought   $ 18.5  
Maximum possible loss   $ 18.5  
Provision for possible loss     $ 0.0