Income Taxes: Net Operating Loss and and Tax Credit Carryforwards (Details)	12 Months Ended
	Dec. 31, 2022 USD ($)
Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 330,085,000
Operating Loss Carryforwards, With no Expiration Date	584,161,000
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	408,269,000
Tax Credit Carryforward	22,817,000
State and Local Jurisdiction | Valuation Allowance, Operating Loss Carryforwards
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards Valuation Allowance	1,100,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	0
State and Local Jurisdiction | Valuation Allowance, Income Tax Credit Carryforwards
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	800,000
Income Tax Credit carryforward, valuation allowance	14,000,000
Valuation allowance, increase to tax expense	600,000
Remaining tax expense related to increase in valuation allowance	$ 200,000