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Commitments and Contingencies Commitments and Contingencies (Details)
3 Months Ended
Mar. 31, 2016
USD ($)
Loss Contingencies [Line Items]  
Additional General Expenses to Remediate Section 7702 and 72(s) Issue $ 2.0
Total costs to remediate IRC Section 7702 issue 0
Toll charges and fees to remediate IRC Section 7702 issue 0
Cost of claim and reserve liabilities to remediate IRC Section 7702 issue 0
IRC Section 7702 remediation costs [Member]  
Loss Contingencies [Line Items]  
Loss Contingency, Range of Possible Loss, Minimum 0
Loss Contingency, Range of Possible Loss, Maximum 0
Minimum [Member]  
Loss Contingencies [Line Items]  
Cost Range to Remediate IRC Section 7702 Issue 0
Maximum [Member]  
Loss Contingencies [Line Items]  
Cost Range to Remediate IRC Section 7702 Issue $ 0