Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
6 Months Ended |
Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
| Basic |
|
|
|
|
| Net income available to common shareholders |
$ 16,926
|
$ 14,833
|
$ 32,642
|
$ 29,084
|
| Less: Income attributable to unvested stock-based compensation awards |
(266)
|
(228)
|
(527)
|
(458)
|
| Net earnings allocated to common shareholders |
$ 16,660
|
$ 14,605
|
$ 32,115
|
$ 28,626
|
| Weighted average shares outstanding, including unvested stock-based compensation awards (in shares) |
15,184,835
|
15,027,648
|
15,168,310
|
15,014,991
|
| Less: unvested stock-based compensation awards (in shares) |
(239,901)
|
(229,133)
|
(245,242)
|
(235,595)
|
| Weighted average shares outstanding - Basic (in shares) |
14,944,934
|
14,798,515
|
14,923,068
|
14,779,396
|
| Diluted |
|
|
|
|
| Net earnings allocated to common shareholders |
$ 16,660
|
$ 14,605
|
$ 32,115
|
$ 28,626
|
| Weighted average shares outstanding - Basic (in shares) |
14,944,934
|
14,798,515
|
14,923,068
|
14,779,396
|
| Plus: Incremental shares from assumed conversion of stock-based compensation awards (in shares) |
121,927
|
118,691
|
131,802
|
103,016
|
| Weighted average shares outstanding - Diluted (in shares) |
15,066,861
|
14,917,206
|
15,054,870
|
14,882,412
|
| Basic EPS (in dollars per share) |
$ 1.11
|
$ 0.99
|
$ 2.15
|
$ 1.94
|
| Diluted EPS (in dollars per share) |
$ 1.11
|
$ 0.98
|
$ 2.13
|
$ 1.92
|