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Income Taxes (Schedule 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 Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning balance $ 58,215 $ 55,077 $ 47,298
Increase (decrease) relating to prior year provision 21,696 719 (112)
Increase relating to current year provision 8,727 2,706 7,891
Reductions based on the lapse of the applicable statutes of limitations 0 (287) 0
Ending balance $ 88,638 $ 58,215 $ 55,077