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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Income Taxes    
Unrecognized tax benefits $ 0.1 $ 0.1
Minimum    
Income Taxes    
Number of tax years open for state tax audit (in years) 3 years  
Maximum    
Income Taxes    
Number of tax years open for state tax audit (in years) 5 years  
Domestic Tax Authority | Earliest Tax Year    
Income Taxes    
Open tax year 2013  
Net Operating Loss And Other Carryforwards | Earliest Tax Year    
Income Taxes    
Open tax year 2005  
Net Operating Loss And Other Carryforwards | Latest Tax Year    
Income Taxes    
Open tax year 2012