Income Taxes (Schedule Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (4,415)		$ 1,297
State	1,834	$ 1,281	1,837
Total current income taxes	(2,581)	1,281	3,134
Deferred:
Federal	(3,906)	(8,721)	21,376
State	(6,530)	(6,229)	(7,596)
Total deferred income taxes	(10,436)	(14,950)	13,780
Total tax expense	$ (13,017)	$ (13,669)	$ 16,914