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Net Income Per Common Share - Summary of Basic and Diluted Weighted Average Common Shares (Detail)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Earnings Per Share [Abstract]        
Basic weighted average common shares outstanding 18,757 21,256 19,184 21,781
Weighted average common equivalent shares 287 491 295 421
Diluted weighted average common shares outstanding 19,044 21,747 19,479 22,202
Options excluded from diluted weighted average share calculation as effect would have been anti-dilutive 602 295 582 746