Quarterly report pursuant to Section 13 or 15(d)

Net Income Per Share (Details)

v3.4.0.3
Net Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Earnings Per Share, Basic, Two Class Method [Abstract]    
Net income and comprehensive income $ 13,099 $ 4,837
Income allocated to participating securities (64) (33)
Numerator for basic and diluted income per share - net income $ 13,035 $ 4,804
Denominator for basic income per share - weighted-average shares 30,420 30,575
Denominator for diluted income per share - adjusted weighted-average shares 30,625 30,981
Basic income per share (dollars per share) $ 0.43 $ 0.16
Diluted income per share (dollars per share) $ 0.43 $ 0.16
Total number anti-dilutive options, non-vested shares, and performance shares excluded from income per diluted share computation 392 166
Stock Option [Member]    
Earnings Per Share, Basic, Two Class Method [Abstract]    
Effect of dilutive stock options and non-vested shares 165 365
Total number anti-dilutive options, non-vested shares, and performance shares excluded from income per diluted share computation 275 151
Key Employee Performance Share Based Plan [Member]    
Earnings Per Share, Basic, Two Class Method [Abstract]    
Effect of dilutive stock options and non-vested shares 40 41
Total number anti-dilutive options, non-vested shares, and performance shares excluded from income per diluted share computation 44 15
Nonvested Shares [Member]    
Earnings Per Share, Basic, Two Class Method [Abstract]    
Total number anti-dilutive options, non-vested shares, and performance shares excluded from income per diluted share computation 73