Summary of Company's Treasure Stock Activity (Parenthetical) (Detail) (USD $)
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12 Months Ended |
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Dec. 31, 2012
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Common stock repurchased value as result of restricted stock forfeitures and canceled | $ 0.001 |
Maximum
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Market Value of Restricted Shares | $ 22.50 |
Minimum
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Market Value of Restricted Shares | $ 19.60 |
X | ||||||||||
- Definition
Common stock repurchased value as result of restricted stock forfeitures and canceled. No definition available.
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X | ||||||||||
- Definition
Market value per share of restricted shares withheld by company related to restricted stock vesting No definition available.
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X | ||||||||||
- Details
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