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Income Taxes (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Examination [Line Items]      
Deferred tax assets related to acquisitions of non controlling interests $ 3,500,000 $ 1,000,000  
Adjustment to the deferred tax assets related to acquisitions of non controlling interests 3,000,000    
Offset to adjustment, reduction in the previously reported tax receivable 1,800,000    
Additional-paid-in-capital 1,200,000    
Tax receivable included in other current assets 3,400,000 4,300,000  
Increase in current state income tax provision 147,000 223,000 $ 393,000
Accrued interest and penalties associated with any unrecognized tax benefits 0 0 0
Interest expense recognized $ 0 $ 0 $ 0
Federal [Member] | Maximum [Member]      
Income Tax Examination [Line Items]      
Periods open for examination 2014    
Federal [Member] | Minimum [Member]      
Income Tax Examination [Line Items]      
Periods open for examination 2012    
State [Member] | Maximum [Member]      
Income Tax Examination [Line Items]      
Periods open for examination 2014    
State [Member] | Minimum [Member]      
Income Tax Examination [Line Items]      
Periods open for examination 2011