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Income Taxes (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]                        
Income Tax Expense (Benefit) $ (490,000) $ 1,845,000 $ 1,077,000 $ 1,082,000 $ 208,000 $ (165,000) $ 1,153,000 $ 2,000 $ 3,514,000 $ 1,200,000 $ 4,020,000  
Effective Income Tax Rate Reconciliation, Percent                 64.10% (61.80%) (206.20%)  
Tax Benefit not Recognized due to Non-Deductibility of Tax Compliance Issue                 $ 241,000 $ 1,152,000 $ 3,514,000  
Non Deductible IRC Section 7702 Toll Charge                     10,000,000  
Non Deductible IRC Section 72(s) Toll Charges                 3,300,000      
Tax Benefit not Recognized due to Non-Deductibility of IRC Section 72(s) Toll Charge                 1,200,000      
Deferred Tax Assets, Valuation Allowance 0       $ 0       0 0 0 $ 0
Release of Tax Valuation Allowance in Other Comprehensive Income                 $ 0 $ 42,000 $ 21,000  
Effective Income Tax Rate Reconciliation, at Federal Statutory Rate, Percent                 35.00% 35.00% 35.00%  
Operating Loss Carryforwards $ 0               $ 0