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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details 5) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:        
Reduction in liability for unrecognized tax benefit, discontinued operation $ 11.0   $ 11.0  
Release of valuation allowance related to state NOL carryforwards   5.3   5.3
Income tax provision upon finalization of the 2012 federal income tax return     2.2  
Maximum
       
Income taxes        
Reduction in liability for unrecognized tax benefits related to continuing operations     $ 7.8