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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)

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