Stockholders' Equity (Schedule Of Restricted Stock Unit Activity Under Stock Plans) (Details) - Restricted Stock [Member] - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||
---|---|---|---|---|---|---|---|
Mar. 31, 2016 |
Dec. 31, 2015 |
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Number of Restricted Stock Units | |||||||
Balance outstanding as of December 31, 2015 (shares) | [1] | 966,000 | |||||
Granted (shares) | [1] | 0 | |||||
Vested (shares) | [1] | (92,000) | |||||
Cancelled (shares) | [1] | (7,000) | |||||
Balance outstanding as of March 31, 2016 (shares) | [1] | 867,000 | 966,000 | ||||
Weighted-Average Grant Date Fair Value | |||||||
Weighted-Average Grant Date Fair Value, Balance outstanding as of December 31, 2014 (usd per share) | $ 15.62 | ||||||
Weighted-Average Grant Date Fair Value, Granted (usd per share) | 0.00 | ||||||
Weighted-Average Grant Date Fair Value, Vested (usd per share) | 17.15 | ||||||
Weighted-Average Grant Date Fair Value, Cancelled (usd per share) | $ 17.59 | ||||||
Weighted-Average Remaining Contractual Life (years), Balance outstanding as of December 31, 2015 | 2 years 8 months 25 days | 2 years 9 months 28 days | |||||
Weighted-Average Grant Date Fair Value, Balance outstanding (usd per share) | $ 15.44 | $ 15.62 | |||||
Weighted-Average Remaining Contractual Life (years), Balance outstanding | 2 years 8 months 25 days | 2 years 9 months 28 days | |||||
Aggregate Intrinsic Value, Balance outstanding as of December 31, 2014 | [2] | $ 9,636 | |||||
Aggregate Intrinsic Value, Balance outstanding | [2] | $ 8,146 | $ 9,636 | ||||
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