Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payment Award Activity (Detail)

v2.4.0.6
Share-Based Payment Award Activity (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Y
Sep. 30, 2012
Y
Number of Shares, Options Outstanding at Beginning of Period 129,900 143,325
Number of Shares, Options Expired (1,075) (14,500)
Number of Shares, Options Outstanding at End of Period 128,825 128,825
Number of Shares, Options Exercisable at End of Period 105,325 105,325
Weighted-Average Exercise Price Per Share, Options Outstanding at Beginning of Period $ 79.86 $ 81.27
Weighted-Average Exercise Price Per Share, Options Expired $ 129.01 $ 97.49
Weighted-Average Exercise Price Per Share, Options Outstanding at End of Period $ 79.45 $ 79.45
Weighted-Average Exercise Price Per Share, Options Exercisable at End of Period $ 94.92 $ 94.92
Weighted-Average Remaining Contractual Life, Options Outstanding at Beginning of Period 5.1 5.5
Weighted-Average Remaining Contractual Life, Options Expired 2 years 8 months 12 days 4 years 2 months 12 days
Weighted-Average Remaining Contractual Life, Options Outstanding at End of Period 4.9 4.9
Weighted-Average Remaining Contractual Life, Options Exercisable at End of Period 4 years 3 months 18 days 4 years 3 months 18 days
Aggregate Intrinsic Value of In-the-Money Options, Options Outstanding at Beginning of Period $ 14 [1]  
Aggregate Intrinsic Value of In-the-Money Options, Options Expired      
Aggregate Intrinsic Value of In-the-Money Options, Options Outstanding at End of Period 120 [2] 120 [2]
Aggregate Intrinsic Value of In-the-Money Options, Options Exercisable at End of Period $ 57 [2] $ 57 [2]
[1] Intrinsic value represents the excess of the closing stock price on the last trading day of the period, which was $10.48 as of June 30, 2012, over the exercise price, multiplied by the number of options.
[2] Intrinsic value represents the excess of the closing stock price on the last trading day of the period, which was $12.81 as of September 30, 2012, over the exercise price, multiplied by the number of options.