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Share-based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of share-based compensation expense | Share-based compensation expense was as follows:
| For the three months ended September 30, |  | For the nine months ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Stock options, net of estimated forfeitures | $ | 4,590 |  |  | $ | 5,578 |  |  | $ | 33,421 |  |  | $ | 21,527 |
Restricted stock awards | 4,042 |  |  | 2,235 |  |  | 10,548 |  |  | 6,897 |
Total non-cash stock compensation | 8,632 |  |  | 7,813 |  |  | 43,969 |  |  | 28,424 |
Deferred compensation arrangement | — |  |  | 216 |  |  | — |  |  | 515 |
Total | $ | 8,632 |  |  | $ | 8,029 |  |  | $ | 43,969 |  |  | $ | 28,939 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 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 S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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