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Components Of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Jan. 01, 2019 | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Accumulated other comprehensive income (loss) | $ (1,034) |  |  | $ 14,563 |  |
Change in derivative instruments designated as cash flow hedges, net of income tax effect of ($2,144) and $3,354 | (14,323) | $ 12,459 |  |  |  |
Reclassification of (gain) loss on derivative instruments designated as cash flow hedges, net of income tax effect of ($606) and ($352) | (1,749) | (1,472) |  |  |  |
Foreign currency translation adjustment | 43 | 92 |  |  |  |
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Accumulated other comprehensive income (loss) | 3,403 | 39,173 |  | 19,043 |  | $ 31,215
Change in derivative instruments designated as cash flow hedges, net of income tax effect of ($2,144) and $3,354 | (14,323) | 12,459 |  |  |  |
Reclassification of (gain) loss on derivative instruments designated as cash flow hedges, net of income tax effect of ($606) and ($352) | (1,749) | (1,472) |  |  |  |
Foreign currency translation adjustment | 0 | 0 |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | (15,640) | 7,958 |  |  |  |
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Accumulated other comprehensive income (loss) | (4,437) | (4,181) |  | (4,480) |  | (4,273)
Change in derivative instruments designated as cash flow hedges, net of income tax effect of ($2,144) and $3,354 | 0 | 0 |  |  |  |
Reclassification of (gain) loss on derivative instruments designated as cash flow hedges, net of income tax effect of ($606) and ($352) | 0 | 0 |  |  |  |
Foreign currency translation adjustment | 43 | 92 |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | 43 | 92 |  |  |  |
AOCI Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Accumulated other comprehensive income (loss) | (1,034) | 34,992 |  | $ 14,563 |  | $ 26,942
Change in derivative instruments designated as cash flow hedges, net of income tax effect of ($2,144) and $3,354 | (14,323) | 12,459 |  |  |  |
Reclassification of (gain) loss on derivative instruments designated as cash flow hedges, net of income tax effect of ($606) and ($352) | (1,749) | (1,472) |  |  |  |
Foreign currency translation adjustment | 43 | 92 |  |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | $ (15,597) | $ 8,050 |  |  |  |
Accounting Standards Update 2018-02 [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Cumulative effect in period of adoption |  |  |  |  | $ (3,029) |
Accounting Standards Update 2018-02 [Member] | Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Cumulative effect in period of adoption |  |  |  |  | 0 |
Accounting Standards Update 2018-02 [Member] | AOCI Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Cumulative effect in period of adoption |  |  |  |  | $ (3,029) |
Accounting Standards Update 2017-12 [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Cumulative effect in period of adoption |  |  | $ 432 |  |  |
Accounting Standards Update 2017-12 [Member] | Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Cumulative effect in period of adoption |  |  | 0 |  |  |
Accounting Standards Update 2017-12 [Member] | AOCI Attributable to Parent [Member] |  |  |  |  |  |
Accumulated Other Comprehensive Income [Roll Forward] |  |  |  |  |  |
Cumulative effect in period of adoption |  |  | $ 432 |  |  |

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