Summary Of Significant Accounting Policies (Accounting Changes To Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 1,259	$ 1,479	$ 9,493	$ 23,611
Change in net deferred tax assets			(888)	152
Prepaid and other assets			(545)	1,662
Net cash provided by operating activities			$ 19,072	8,755
Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		1,458		23,553
Change in net deferred tax assets				127
Prepaid and other assets				1,745
Net cash provided by operating activities				8,755
Adjustments [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income		$ 21		58
Change in net deferred tax assets				25
Prepaid and other assets				$ (83)