Annual report pursuant to Section 13 and 15(d)

NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Details 5)

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NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Details 5) - USD ($)
$ in Millions
Jan. 01, 2018
Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Long-term deferred tax assets   $ 21.6
Scenario, Previously Reported    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Long-term deferred tax assets   16.0
Accounting Standards Update 2015-07    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Deferred tax assets, net, current   $ (5.6)
Subsequent Event | Retained Earnings (Accumulated deficit) | Accounting Standards Update 2014-09    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Cumulative effect of new accounting principle $ 0.8