Annual report pursuant to Section 13 and 15(d)

Income Taxes (Summary of tax net operating loss carryforwards) (Details)

v3.3.1.900
Income Taxes (Summary of tax net operating loss carryforwards) (Details)
$ in Thousands
Dec. 31, 2015
USD ($)
Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 340,471
Federal | 2020  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 34,958
Federal | 2021  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 29,614
Federal | 2022  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 14,081
Federal | 2023  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 3,968
Federal | 2024  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 722
Federal | 2025  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 737
Federal | 2026  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 150
Federal | 2027  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 1,010
Federal | 2028  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 39,879
Federal | 2029  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 48,370
Federal | 2031  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 110,933
Federal | 2033  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 5,031
Federal | 2034  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 39,133
Federal | 2035  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 11,885
State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 331,711
State | 2020  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 34,301
State | 2021  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 28,987
State | 2022  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 13,788
State | 2023  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 3,903
State | 2024  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
State | 2025  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
State | 2026  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
State | 2027  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
State | 2028  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 39,715
State | 2029  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 47,558
State | 2031  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 109,376
State | 2033  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 4,927
State | 2034  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 37,866
State | 2035  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 11,290