Annual report pursuant to Section 13 and 15(d)

Income Taxes (Summary of Federal Operating Loss Carryforwards) (Details)

v3.6.0.2
Income Taxes (Summary of Federal Operating Loss Carryforwards) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Operating Loss Carryforwards [Line Items]  
Federal NOL carryforwards $ 387,745
2017-2022 [Member]  
Operating Loss Carryforwards [Line Items]  
Federal NOL carryforwards 56,979
2023-2025 [Member]  
Operating Loss Carryforwards [Line Items]  
Federal NOL carryforwards 65,878
2026-2028 [Member]  
Operating Loss Carryforwards [Line Items]  
Federal NOL carryforwards 32,714
2029-2031 [Member]  
Operating Loss Carryforwards [Line Items]  
Federal NOL carryforwards 53,806
2032-2036 [Member]  
Operating Loss Carryforwards [Line Items]  
Federal NOL carryforwards $ 178,368