Summary Of Significant Accounting Policies (Accounting Changes To Consolidated Statements Of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)	$ 2,357	$ (2,097)	$ 5,129	$ 3,104	$ 260	$ 8,232
Change in net deferred tax assets					(30)	(1,138)
Prepaid and other assets					(2,477)	(3,931)
Net cash provided by operating activities					$ 3,058	13,330
As Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)			5,101			8,169
Change in net deferred tax assets						(1,165)
Prepaid and other assets						(3,841)
Net cash provided by operating activities						13,330
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income (loss)			$ 28			63
Change in net deferred tax assets						27
Prepaid and other assets						$ (90)