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Equity - Options (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Weighted Average Price |  |
Outstanding at the beginning of the year (in dollars per share) | $ 29.60 |
Outstanding at the end of the year (in dollars per share) | $ 30.76 | $ 29.60
Other information |  |
Weighted average remaining contractual life (in years) | 2 years 10 months 24 days | 2 years 7 months 6 days
Stock options |  |
Nonqualified stock option activity |  |
Outstanding at the beginning of the year (in shares) | 40,001 | 43,334
Granted (in shares) |  | 0
Exercised (in shares) | (6,667) | (3,333)
Outstanding at the end of the year (in shares) | 33,334 | 40,001
Options exercisable at end of the period (in shares) | 28,334 | 30,001
Weighted Average Price |  |
Outstanding at the beginning of the year (in dollars per share) | $ 29.60 | $ 29.16
Exercised (in dollars per share) | 23.79 | 23.79
Outstanding at the end of the year (in dollars per share) | 30.76 | 29.60
Exercisable at the end of the period (in dollars per share) | $ 45.45 | $ 31.99
Other information |  |
Aggregate intrinsic value of exercisable options at the end of the year | $ 498,000 |
Weighted average remaining contractual life of options exercisable | 2 years 10 months 24 days |
Value of options exercised | $ 159,000 | $ 79,000
Market value of options on the date of exercise | 311,000 | 140,000
Compensation expense related to share-based award | $ 15,000 | $ 14,000
Stock options | 2017 |  |
Other information |  |
Awards scheduled to vest (in shares) | 5,000 |
Remaining compensation expense | $ 3,000,000 |
Stock options | Vest beyond 2017 |  |
Other information |  |
Awards scheduled to vest (in shares) | 0 |

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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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