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Equity Compensation Plans - Options (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Equity Compensation Plans |  |
Total compensation cost | $ 335,000 |
Stock options |  |
Equity Compensation Plans |  |
Granted (in shares) | 0 | 0
Term of stock options granted | 10 years |
Total unrecognized compensation cost | $ 0 |
Shares |  |
Beginning outstanding (in shares) | 94,500 |
Ending outstanding (in shares) | 94,500 |
Exercisable at end of period (in shares) | 94,500 |
Weighted Average Exercise Price |  |
Beginning outstanding (in dollars per share) | $ 25.82 |
Ending outstanding (in dollars per share) | 25.82 |
Exercisable at end of period (in dollars per share) | $ 25.82 |
Weighted Average Remaining Contractual Term (years) |  |
Ending outstanding (in years) | 9 months 18 days |
Exercisable at end of period | 9 months 18 days |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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