Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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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

No definition available.

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Equity-Based Compensation - Summary of Equity-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	$ 6,661	$ 6,357	$ 21,004	$ 16,972
Unamortized Equity-Based Compensation	37,226		37,226
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	5,530	5,870	18,352	15,431
Unamortized Equity-Based Compensation	27,217		$ 27,217
Weighted Average Years Remaining of Equity-Based Compensation			1 year 10 months 6 days
SARs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	61	195	$ 340	646
Unamortized Equity-Based Compensation	185		$ 185
Weighted Average Years Remaining of Equity-Based Compensation			1 year 1 month 20 days
DSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	99	99	$ 135	347
Unamortized Equity-Based Compensation	1,166		$ 1,166
Weighted Average Years Remaining of Equity-Based Compensation			2 years 11 months 12 days
Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	5,690	6,164	$ 18,827	16,424
Unamortized Equity-Based Compensation	28,568		28,568
Subsidiaries
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	971	193	2,177	548
Unamortized Equity-Based Compensation	8,658		$ 8,658
Weighted Average Years Remaining of Equity-Based Compensation			3 years 2 months 16 days
Cost of revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	48	16	$ 103	55
Sales and marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	173	35	310	118
General and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	6,270	6,270	20,250	16,706
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	$ 170	$ 36	$ 341	$ 93