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Stock-Based Compensation (Summary Of RSU Awards Activity) (Details) (Restricted Stock Unit Awards [Member], USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Restricted Stock Unit Awards [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Nonvested at January 1, 2012 236,331
Number of Shares, Granted   
Number of Shares, Vested (86,524)
Number of Shares, Forfeited (9,623)
Number of Shares, Nonvested at March 31, 2012 140,184 [1]
Weighted-Average Grant Date Fair Value, Nonvested at January 1, 2012 $ 15.88
Weighted-Average Grant Date Fair Value, Granted   
Weighted-Average Grant Date Fair Value, Vested $ 14.66
Weighted-Average Grant Date Fair Value, Forfeited $ 15.91
Weighted-Average Grant Date Fair Value, Nonvested at March 31, 2012 $ 16.63 [1]
Number of shares, expected to vest 132,135
[1] 132,135 of these shares are expected to vest.