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Summary Of Significant Accounting Policies (Accounting Changes To Consolidated Statements Of Cash Flows) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | [1] | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | [1] | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ 6,006 | $ 1,259 | $ 4,129 | $ 3,104 | $ 7,503 | $ 1,478 | $ 19,071 | $ 3,060 | $ 14,498 | $ 31,112 | $ 9,692 | [2]
Change in net deferred tax assets |  |  |  |  |  |  |  |  | (1,719) | 4,117 | (4,942) |
Prepaid and other assets |  |  |  |  |  |  |  |  | (2,761) | 350 | (992) |
Net cash provided by operating activities |  |  |  |  |  |  |  |  | $ 32,645 | 23,851 | 30,188 |
As Reported [Member] |  |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  | 31,010 | 9,417 |
Change in net deferred tax assets |  |  |  |  |  |  |  |  |  | 4,073 | (5,060) |
Prepaid and other assets |  |  |  |  |  |  |  |  |  | 496 | (599) |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  | 23,851 | 30,188 |
Adjustments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  | 102 | 275 |
Change in net deferred tax assets |  |  |  |  |  |  |  |  |  | 44 | 118 |
Prepaid and other assets |  |  |  |  |  |  |  |  |  | $ (146) | $ (393) |
[1] | Net income for the 4th quarter of 2017 includes approximately $2.5 million net tax benefit from non-recurring items of tax benefit and expense related to the Tax Cuts and Jobs Act enacted December 2017 and dissolution of a non-operating foreign subsidiary.
[2] | Certain prior year balances have been reclassified to conform to the 2017 presentation (see Note 2 - Summary of Significant Accounting Policies - Reclassifications).

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