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Share-based payments | 6 Months Ended
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Jun. 30, 2018
Share-Based Payment Arrangements [Abstract] |
Share-based payments | Share-based payments On July 31, 2015 the Company established the Long Term Incentive Plan ("LTIP" or the "2015 Plan") providing for the grant of performance share units (“PSUs”) to employees and officers selected by the Compensation Committee of the Board of Directors (the “Compensation Committee”). PSU awards are earned based on achievement against one or more performance metrics established by the Compensation Committee in respect of a specified performance period. Earned PSUs range from zero to a specified maximum percentage of a participant's target award based on the performance of applicable performance metrics, and are also subject to vesting terms based on continued employment. The first performance period was settled at the beginning of the second quarter of 2018, with PSUs earned based on achievement of EBITDA metrics established by the Compensation Committee and total shareholder return relative to a peer group. Earned and vested, PSUs settled in one share of Company common stock per vested PSU (or, at the Company’s election, cash equal to the fair market value thereof). The first vesting period ended March 31, 2018 (the “2015 Plan”) and PSUs common stocks are issued to participants on April 30, 2018 except for certain PSUs settled in cash at fair market value to cover wage taxes or as substitute for share transfer restrictions. All PSUs are granted under, and are subject to the terms and conditions of, the Company’s 2014 Incentive Compensation Plan, and do not increase the number of shares previously reserved for issuance under that plan. On August 2, 2016 the Compensation Committee established a consecutive LTIP (the "2016 Plan") having consistent terms as compared to the 2015 Plan. On July 31, 2017 the Compensation Committee established a consecutive LTIP (the "2017 Plan"). The following table details the costs charged to the income statement with respect to the 2015 Plan, 2016 Plan and 2017 Plan.
|  | USD k
|  | For the Six Months Ended Jun 30,
|  | 2018 |  | 2017
Expense arising from equity-settled share based payment transactions (2015 Plan) |  | 777 |  |  | 1,241 |
Expense arising from equity-settled share based payment transactions (2016 Plan) |  | 2,253 |  |  | 1,968 |
Expense arising from equity-settled share based payment transactions (2017 Plan) |  | 2,360 |  |  | — |
Expenses arising form equity-settled share based 2018 incentive |  | 563 |  |  | — |
Total expenses |  | 5,953 |  |  | 3,209 |
The following table illustrates the number of, and movements in, performance share units ("PSUs") during the period.
|  | 2015 Plan |  | 2016 Plan |  | 2017 Plan |  | Total
|  | Number of PSUs |  | Number of PSUs |  | Number of PSUs |  | Number of PSUs
|  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017 |  | 2018 |  | 2017
Outstanding at January 1, |  | 452,816 |  |  | 454,959 |  |  | 686,038 |  |  | 690,279 |  |  | 472,040 |  |  |  |  |  | 1,610,894 |  |  | 1,145,238 |
Granted during the period |  | — |  |  | — |  |  | 113 |  |  | — |  |  | 830 |  |  |  |  |  | 943 |  |  | — |
Forfeited during the period |  | (5,694 | ) |  | (1,515 | ) |  | (8,544 | ) |  | (4,241 | ) |  | (5,521 | ) |  |  |  |  | (19,759 | ) |  | (5,756 | )
Vested during the period |  | (447,122 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  |  | (447,122 | ) |  | — |
Outstanding at June 30, |  | — |  |  | 453,444 |  |  | 677,607 |  |  | 686,038 |  |  | 467,349 |  |  | — |  |  | 1,144,956 |  |  | 1,139,482 |
The Company created and registered 400,453 new shares on April 30, 2018 of which 380,436 shares were used to settled the 2015 Plan. The remaining new shares plus 1,284 treasury shares were granted to our Board of Directors as a 2018 incentive. The fair value of the PSUs settled on April 30, 2018 amounted to USD 26.80 per PSU. The remaining portion of PSUs vested on March 31, 2018 was settled in cash at fair market value to cover employee wage tax obligations or in very limited cases as a substitute were share settlement was impeded. All obligations of the Company arising form the 2015 Plan were fulfilled through settlement during the reporting period and settlement is reflected in the consolidated statement of changes in equity of the Company. The following table lists the inputs to the model used for the grant date fair values of the 2015 Plan, 2016 Plan and 2017 Plan.
| 2015 Plan |  | 2016 Plan |  | 2017 Plan
Dividend Yield (%) | 2.14% |  | 2.23% |  | 1.88%
Expected Volatility OEC (%) | 25.16% |  | 32.07% |  | 33.77%
Expected Volatility Peer Group (%) | 13.90% |  | 18.12% |  | 17.30%
Correlation | 0.5234 |  | 0.4952 |  | 0.4574
Risk-free interest rate (%) | 0.90% |  | 0.76% |  | 1.45%
Model used | Monte Carlo |  | Monte Carlo |  | Monte Carlo
Weighted average fair value of PSUs granted in USD | 17.41 |  | 17.21 |  | 24.89

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- Definition The entire disclosure for share-based payment arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 44 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_44&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Share-Based Payment Arrangements [Abstract] + References No definition available. + Details
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