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Share-Based Compensation - Summary of Share-Based Compensation Expenses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Summary of share-based compensation expense |  |  |
Share-based compensation before income tax benefit | $ 3,848 | $ 2,930 | $ 5,221
Income tax benefit | (1,454) | (1,102) | (1,936)
Share-based compensation, net of income tax benefit | 2,394 | 1,828 | 3,285
Restricted Stock |  |  |
Summary of share-based compensation expense |  |  |
Share-based compensation before income tax benefit | 2,111 | 2,495 | 3,073
Performance unit incentive plan (“PUP”) |  |  |
Summary of share-based compensation expense |  |  |
Share-based compensation before income tax benefit | 1,692 | 359 | 1,864
Restricted stock units |  |  |
Summary of share-based compensation expense |  |  |
Share-based compensation before income tax benefit | 45 | 76 | 177
Stock Options |  |  |
Summary of share-based compensation expense |  |  |
Share-based compensation before income tax benefit | $ 0 | $ 0 | $ 107

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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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition The amount of expense, net of income tax, 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 No definition available. + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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