Annual report pursuant to Section 13 and 15(d)

Earnings per Share - Reconciliation of Components Used to Derive Basic and Diluted EPS (Detail)

v3.6.0.2
Earnings per Share - Reconciliation of Components Used to Derive Basic and Diluted EPS (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Earnings Per Share [Abstract]                        
Net income   $ 14,416 $ 13,121 $ 14,148 $ 14,804 $ 14,829 $ 13,958 $ 13,983 $ 11,053 $ 56,489 $ 53,823 $ 49,761
Less: income allocated to unvested restricted shares                   457 145  
Income from continuing operations, net of taxes                   56,489 53,823 50,205
Income (loss) from discontinued operations $ (444)                 0 0 $ (444)
Net Income (Loss) Available to Common Stockholders, Basic                   56,032 53,678  
Income allocated to common shares                   $ 56,032 $ 53,678  
Weighted-average shares for basic EPS (shares)                   31,899,582 31,788,215 31,696,100
Effect of dilutive securities - options, warrants and unvested restricted stock (shares)                   149,122 88,605 281,964
Weighted-average shares for diluted EPS                   32,048,704 31,876,820 31,978,064
Net income per share, basic (in usd per share)                   $ 1.77 $ 1.69  
Net income per share, diluted (in usd per share)                   1.76 1.68  
Income from continuing operations, net of taxes (in usd per share)                   1.76 1.69 $ 1.58
Effect of dilutive securities (in USD per share)                   0.01 0.00  
Loss from discontinued operations, net of taxes (in usd per share)                   0.00 0.00 (0.01)
Basic earnings per share (in usd per share)   $ 0.45 $ 0.41 $ 0.44 $ 0.46 $ 0.46 $ 0.44 $ 0.44 $ 0.35 1.76 1.69 1.57
Income from continuing operations, net of taxes (in usd per share)                   1.75 1.68 1.57
Net loss from discontinued operation per diluted share (in usd per share) $ (0.01)                     (0.01)
Diluted earnings per share (in usd per share)   $ 0.45 $ 0.41 $ 0.44 $ 0.46 $ 0.46 $ 0.44 $ 0.44 $ 0.35 $ 1.75 $ 1.68 $ 1.56