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Income Taxes (Reconciliatoin Of The Unrecognized Tax Benefits Rollforward) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of the beginning and ending balance of unrecognized tax benefits    
Beginning balance $ 2,164 $ 2,398
Additions for current year tax positions 339 299
Additions for prior year tax positions 0 377
Decreases related to lapse of applicable statute of limitation (852) (910)
Ending balance $ 1,651 $ 2,164