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Stock Incentive Plans and Share-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock Option Activity | The following table summarizes the Company’s stock option activity:
|  | Stock Options |
|  |  |  |  |  | Weighted- |
|  |  |  |  |  | Average |
|  | Shares |  |  | Exercise Price |
Outstanding at January 1, 2018 |  |  | 4,375,929 |  |  | $ | 10.73 |
Granted |  |  | — |  |  |  |  |
Exercised |  |  | (42,429 | ) |  | $ | 5.04 |
Cancelled |  |  | (173,409 | ) |  | $ | 10.33 |
Outstanding at June 30, 2018 |  |  | 4,160,091 |  |  | $ | 10.80 |
Vested at June 30, 2018 |  |  | 2,456,208 |  |  | $ | 9.49 |
Exercisable at June 30, 2018 |  |  | 305,004 |  |  | $ | 4.14 |
Summary of RSU and PSU Activity | The following table summarizes the Company’s RSU and PSU activity:
|  | RSUs |  |  | PSUs |
|  |  |  |  |  | Weighted- |  |  |  |  |  |  | Weighted- |
|  |  |  |  |  | Average Grant |  |  |  |  |  |  | Average Grant |
|  | Shares |  |  | Date Fair Value |  |  | Shares(1) |  |  | Date Fair Value |
Outstanding at January 1, 2018 |  |  | — |  |  |  |  |  |  |  | 62,791 |  |  | $ | 27.87 |
Granted |  |  | 241,542 |  |  | $ | 29.09 |  |  |  | 108,957 |  |  | $ | 28.72 |
Vested |  |  | — |  |  |  |  |  |  |  | — |  |  |  |  |
Cancelled |  |  | (5,386 | ) |  | $ | 28.72 |  |  |  | — |  |  |  |  |
Outstanding at June 30, 2018 |  |  | 236,156 |  |  | $ | 29.10 |  |  |  | 171,748 |  |  | $ | 28.41 |
__________________
| (1) | The number of Shares listed for PSUs represents the “target” number of PSUs granted to each recipient eligible to vest if the Company meets its “target” performance goals for the applicable period. The actual number of PSUs eligible to vest will vary depending on whether or not the Company meets or exceeds the applicable threshold, target or maximum performance goals for the PSUs. With respect to 108,957 of the listed “target” number of PSUs, 200% of the “target” number of PSUs will be eligible to vest at “maximum” performance levels.

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- Definition Schedule of nonvested restricted stock units and performance based restricted stock units activity. + References No definition available. + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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