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Stock-Based Compensation Arrangements (Detail Textuals 2) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Stock options |  |  |
Stock based compensation, additional disclosures |  |  |
Income (expense) recognized due to revision of forfeiture rate | $ 0.1 | $ 0.5 |
Stock options | Minimum |  |  |
Stock based compensation, additional disclosures |  |  |
Forfeiture rate (as a percent) | 0.00% |  |
Stock options | Maximum |  |  |
Stock based compensation, additional disclosures |  |  |
Forfeiture rate (as a percent) | 30.00% |  |
Restricted Stock Units |  |  |
Stock based compensation, additional disclosures |  |  |
Income (expense) recognized due to revision of forfeiture rate |  | $ 0.5 |
Granted (in shares) |  |  | 85,097
Restricted stock units, net of forfeitures |  | 80,969 |

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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