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Net Income Per Share - Summary of Dilutive Effect for Awards with Exercise Price Less than Average Stock Price (Detail)
In Thousands, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
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Mar. 31, 2014
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| Earnings Per Share [Abstract] | ||
| Weighted average common shares outstanding, basic | 40,987 | 42,162 |
| Dilutive potential common shares | 912 | 2,359 |
| Weighted average common shares outstanding, diluted | 41,899 | 44,521 |
| Shares excluded | 2,735 | 739 |