Annual report pursuant to Section 13 and 15(d)

Income Taxes (Summary of Tax Net Operating Loss Carryforwards) (Details)

v3.6.0.2
Income Taxes (Summary of Tax Net Operating Loss Carryforwards) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 272,054
State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 266,006
2022 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 10,236
2022 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 11,371
2023 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 3,968
2023 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 3,903
2024 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 722
2024 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
2025 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 737
2025 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
2026 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 150
2026 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
2027 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 1,010
2027 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 0
2028 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 39,879
2028 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 39,715
2029 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 48,370
2029 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 47,558
2031 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 110,933
2031 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 109,376
2033 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 5,031
2033 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 4,927
2034 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 39,133
2034 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 37,866
2035 | Federal  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards 11,885
2035 | State  
Operating Loss Carryforwards [Line Items]  
Net operating loss carryforwards $ 11,290