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Share-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2019
Share-based Compensation |
Summary of allocation of share-based compensation expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fiscal Year Ended |
​ | ​ | December 31, |  | December 25, |  | December 26, |
​ |  | 2019 | ​ | 2018 | ​ | 2017 |
Labor expense | ​ | $ | 9,032 | ​ | $ | 8,463 | ​ | $ | 7,171 | ​
General and administrative expense | ​ |  | 26,468 | ​ |  | 25,520 | ​ |  | 19,763 | ​
Total share-based compensation expense | ​ | $ | 35,500 | ​ | $ | 33,983 | ​ | $ | 26,934 | ​
Summary of restricted stock unit activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-Average |  | Weighted-Average |  | ​ | ​ |
​ | ​ | ​ | ​ | Grant Date Fair | ​ | Remaining Contractual | ​ | Aggregate |
​ | ​ | Shares | ​ | Value | ​ | Term (years) | ​ | Intrinsic Value |
Outstanding at December 25, 2018 |  | 824,945 | ​ | $ | 53.51 | ​ | ​ | ​ | ​ | ​ | ​
Granted |  | 561,191 | ​ | ​ | 57.84 | ​ | ​ | ​ | ​ | ​ | ​
Forfeited |  | (74,483) | ​ | ​ | 56.75 | ​ | ​ | ​ | ​ | ​ | ​
Vested |  | (475,226) | ​ | ​ | 55.13 | ​ | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2019 |  | 836,427 | ​ | $ | 55.20 |  | 1.1 | ​ | $ | 47,110 | ​
Summary of performance share units | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted-Average |  | Weighted-Average |  | ​ | ​
​ | ​ | ​ | ​ | Grant Date Fair | ​ | Remaining Contractual | ​ | Aggregate
​ | ​ | Shares | ​ | Value | ​ | Term (years) | ​ | Intrinsic Value
Outstanding at December 25, 2018 |  | 90,000 | ​ | $ | 54.18 | ​ | ​ | ​ | ​ | ​
Granted |  | 117,000 | ​ | ​ | 61.86 | ​ | ​ | ​ | ​ | ​
Incremental Performance Shares (1) | ​ | 52,169 | ​ | ​ | 54.18 | ​ | ​ | ​ | ​ | ​
Forfeited |  | (40,000) | ​ | ​ | 61.86 | ​ | ​ | ​ | ​ | ​
Vested |  | (142,169) | ​ | ​ | 54.18 | ​ | ​ | ​ | ​ | ​
Outstanding at December 31, 2019 |  | 77,000 | ​ | $ | 61.86 |  | 0.1 | ​ | $ | 4,337
(1) | Additional shares from the December 2017 PSU grant that vested in January 2019 due to exceeding the initial 100% target.

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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