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Employee and Non-Employee Benefit Plans (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 USD ($) plan shares | Jun. 30, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of active equity-based compensation plans | plan | 2 |
Restricted Stock Units (RSUs) | The 2014 Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Grants in period (in shares) | 280,074 |
RSUs forfeited for termination of employment (in shares) | 14,616 |
Unamortized balance of liability-classified awards, net of estimated forfeitures | $ | $ 1,268 |
Restricted Stock Units (RSUs) | The Directors' Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Grants in period (in shares) | 62,995 |
Restricted Stock and Restricted Stock Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unvested awards (in shares) | 497,492 | 654,486

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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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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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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