Share Based Compensation (Details)
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3 Months Ended |
6 Months Ended |
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Jun. 08, 2018
item
shares
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Jan. 01, 2018
item
shares
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Jun. 30, 2018
shares
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Jun. 30, 2018
shares
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Jun. 30, 2017
shares
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| Restricted shares |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Total Number of restricted shares granted |
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1,694,941
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502,981
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| Stock options |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Granted (in shares) |
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359,618
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447,795
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| 2013 Plan | Restricted shares |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Total Number of restricted shares granted |
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1,678,743
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| 2013 Plan | Restricted shares | Time-vested and performance-vested |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Total Number of restricted shares granted |
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1,609,857
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| 2013 Plan | Restricted shares | Vesting based on time |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Percentage of share instruments issued |
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50.00%
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| 2013 Plan | Restricted shares | Vesting based on time | Minimum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Service based vesting period of awards |
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3 years
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| 2013 Plan | Restricted shares | Vesting based on time | Maximum |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Service based vesting period of awards |
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5 years
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| 2013 Plan | Restricted shares | Vesting based on performance |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Percentage of share instruments issued |
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50.00%
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| Vesting installments | item |
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3
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| 2013 Plan | Restricted shares remaining | Vesting based on service |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Total Number of restricted shares granted |
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68,886
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| Service based vesting period of awards |
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4 years
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| 2013 Plan | Stock options |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Total Number of options granted |
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357,256
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| 2013 Plan | Stock options | Vesting based on performance |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting percentage |
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40.00%
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| 2013 Plan | Stock options | Vesting based on service |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting percentage |
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60.00%
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| Service based vesting period of awards |
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4 years
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| 2018 Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of shares authorized |
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3,372,484
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3,372,484
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| 2018 Plan | Restricted shares |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Total Number of restricted shares granted |
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16,198
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16,198
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| 2018 Plan | Stock options |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Total Number of options granted |
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2,362
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| 2018 Plan | Stock options | Vesting based on performance |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting percentage |
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50.00%
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| 2018 Plan | Stock options | Vesting based on service |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting percentage |
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50.00%
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| Service based vesting period of awards |
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3 years
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| 2018 Plan | Employee Stock Purchase Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of shares authorized |
350,388
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| Term of the offering period |
18 months
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| Number of offering periods | item |
3
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| Term of individual offering periods |
6 months
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| Term established for purchasing stock under the employee stock purchase plan |
3 months
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| Discount percentage |
5.00%
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| Number of times a participant may make change or withdrawal from plan during a term | item |
1
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