Annual report pursuant to Section 13 and 15(d)

Income Taxes (Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits) (Details)

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Income Taxes (Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Interest [Roll Forward]      
Balance at beginning of year $ 2,011 $ 910 $ 682
Additions based on tax positions related to the current year 630 525 417
Additions for tax positions of prior years 777 576 0
Reductions for tax positions of prior years 0 0 (189)
Balance at end of year $ 3,418 $ 2,011 $ 910