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Equity Based Plans (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 17, 2016 | Mar. 16, 2016
Share-based Compensation [Abstract] |  |  |  |  |
Number of shares authorized (in shares) | 2,700,000 |  |  |  |
Number of common shares available for grant (in shares) | 309,480 |  |  |  |
Shares outstanding for which restrictions had not lapsed (in shares) | 150,771 | 152,926 |  |  |
Restricted Stock [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Compensation expense | $ 6,985 | $ 5,939 | $ 5,032 |  |
Compensation not yet recognized | $ 9,200 |  |  |  |
Amended 2003 Plan [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Number of shares authorized (in shares) | 2,100,000 |  |  | 2,100,000 | 1,750,000
Number of common shares available for grant (in shares) | 301,705 |  |  |  |
Employees [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Restricted period on the stock granted | 4 years |  |  |  |
Executive Officer [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Restricted period on the stock granted | 4 years |  |  |  |
Maximum [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Restrictions will lapse in | 2023 |  |  |  |
Maximum [Member] | Non Qualified Stock Options [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Number of shares authorized (in shares) | 600,000 |  |  |  |
Maximum [Member] | Amended 2003 Plan [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Number of common shares available for grant (in shares) | 2,100,000 |  |  |  |
Minimum [Member] |  |  |  |  |
Share-based Compensation [Abstract] |  |  |  |  |
Restrictions will lapse in | 2020 |  |  |  |

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