Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Summary Of Tax Credit Carryforwards) (Details)

v3.7.0.1
Income Taxes (Summary Of Tax Credit Carryforwards) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Tax Credit Carryforward [Line Items]  
Total net operating loss amount $ 172,419
Tax windfall (270)
After limitations 172,149
Operating loss carryforward expiration year 2021  
Tax Credit Carryforward [Line Items]  
Net operating loss amount 32,408
Operating loss carryforward expiration year 2022  
Tax Credit Carryforward [Line Items]  
Net operating loss amount 115,000
Operating loss carryforward expiration year 2023  
Tax Credit Carryforward [Line Items]  
Net operating loss amount 5,712
Operating loss carryforward expiration year 2024  
Tax Credit Carryforward [Line Items]  
Net operating loss amount 3,566
Operating loss carryforward expiration year 2025 and beyond  
Tax Credit Carryforward [Line Items]  
Net operating loss amount $ 15,733