Income Taxes: Net Operating Loss Carryforwards (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Operating Loss Carryforwards [Line Items] | |||
Deferred Income Tax Expense (Benefit) | $ (24,239) | $ 80,992 | $ 82,704 |
Deferred Tax Assets, Operating Loss Carryforwards | 139,371 | $ 155,276 | |
Internal Revenue Service (IRS) | |||
Operating Loss Carryforwards [Line Items] | |||
Operating Loss Carryforwards | 663,741 | ||
State and Local Jurisdiction | |||
Operating Loss Carryforwards [Line Items] | |||
Operating Loss Carryforwards | 542,632 | ||
Valuation Allowance, Deferred Tax Asset, Change in Amount | 3,500 | ||
State and Local Jurisdiction | Valuation Allowance, Operating Loss Carryforwards | |||
Operating Loss Carryforwards [Line Items] | |||
Operating Loss Carryforwards Valuation Allowance | 400 | ||
Valuation Allowance, Deferred Tax Asset, Change in Amount | 400 | ||
Valuation Allowance Reduction due to Expired NOL | 1,200 | ||
Deferred Income Tax Expense (Benefit) | 400 | ||
Deferred Tax Assets, Operating Loss Carryforwards | $ 1,200 |