Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narratives) (Details)

v3.6.0.2
Income Taxes (Narratives) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating Loss Carryforwards [Line Items]      
Income tax (expense) benefit $ (5,205,000) $ 1,847,000 $ (10,029,000)
Federal statutory income tax rate 35.00%    
Unrecognized tax benefits $ 0 0 0
Income tax interest expense 0 0 0
Income tax penalties expense 0 $ 0 $ 0
Cumulative excess tax benefits, share based compensation expense, not recognize 7,400,000    
Alternative Minimum Tax Credit Carryforward      
Operating Loss Carryforwards [Line Items]      
Alternative minimum tax credit carryforwards 1,700,000    
Federal      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards $ 272,054,000