Equity-Based Compensation - Issued And Unvested Shares Of Restricted Stock Granted (Detail) - Restricted Stock, Time Vested	9 Months Ended
Sep. 30, 2015 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	3,531,437
First Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	1,702,366
Second Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	503,315
Third Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	1,124,100
Third Vesting, Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	25.00%
Vesting term	4 years
Fourth Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	45,834
Fifth Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	15,406
Fifth Vesting, Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	33.33%
Fifth Vesting, Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	33.33%
Fifth Vesting, Tranche Three
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	33.33%
Sixth Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	50,416
Seventh Vesting
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares Unvested	90,000
Seventh Vesting, Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	33.30%
Seventh Vesting, Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage	8.00%

Share-based Compensation Arrangement By Share-Based Payment Award, Award Vest Rights, Term

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ 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 (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Percentage of vesting of share-based compensation awards.

+ 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 (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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