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Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)
 3 Months Ended
Mar. 31, 2012
Y
Stock-Based Compensation [Abstract]  
Options outstanding at December 31, 2011, Shares 356,241
Options outstanding at December 31, 2011, Weighted Average Exercise Price per Share $ 6.51
Options outstanding at March 31, 2012, Shares 356,241
Options outstanding at March 31, 2012, Weighted Average Exercise Price per Share $ 6.51
Options exercisable at March 31, 2012, Shares 356,241
Options exercisable at March 31, 2012, Weighted Average Exercise Price per Share $ 6.51
Options outstanding at December 31, 2011, Weighted Average Remaining Contractual Term, Years 3.41
Options outstanding at December 31, 2011, Aggregate Intrinsic Value $ 8,172,000
Options outstanding at March 31, 2012, Weighted Average Remaining Contractual Term, Years 3.16
Options outstanding at March 31, 2012, Aggregate Intrinsic Value 8,054,000
Options exercisable at March 31, 2012, Weighted Average Remaining Contractual Term, Years 3.16
Options exercisable at March 31, 2012, Aggregate Intrinsic Value $ 8,054,000