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Stock-Based Compensation - Other Information Concerning Stock Options (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||
| Weighted average fair value of stock options granted | $ 1.66 | $ 2.43 | $ 1.71 |
| Aggregate intrinsic value of stock options exercised | $ 117 | $ 172 | $ 926 |