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Summary Of Significant Accounting Policies (Accounting Changes To Consolidated Statements Of Cash Flows) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Net income (loss) | $ (2,097) | $ 3,104
Change in net deferred tax assets | (150) | 172
Prepaid and other assets | (1,957) | (2,309)
Net cash provided by operating activities | $ (3,841) | 2,452
As Reported [Member] |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Net income (loss) |  | 3,069
Change in net deferred tax assets |  | 157
Prepaid and other assets |  | (2,259)
Net cash provided by operating activities |  | 2,452
Adjustments [Member] |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |
Net income (loss) |  | 35
Change in net deferred tax assets |  | 15
Prepaid and other assets |  | $ (50)

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