Income Taxes Domestic Tax Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal
Current	$ (6,076)	$ (5,526)	$ 806
Deferred	(15,169)	(15,588)	17,378
Investment tax credits	(12)	(33)	166
State
Current	27	38	33
Deferred	1,305	2,399	(5,015)
Income Tax (Benefit) Expense	$ (19,925)	$ (18,710)	$ 13,368