Equity-Based Compensation - Summary of Equity-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 3,026	$ 6,464	$ 11,433	$ 20,395
Unrecognized equity-based compensation	18,456	34,107	18,456	34,107
Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	2,506	5,690	9,824	18,827
Unrecognized equity-based compensation	13,421	28,568	13,421	28,568
Subsidiaries
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	520	774	$ 1,609	1,568
Weighted Average Years Remaining of Equity-Based Compensation as of September 30, 2016			2 years 9 months
Unrecognized equity-based compensation	5,035	5,539	$ 5,035	5,539
DSUs \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	74	99	$ 267	135
Weighted Average Years Remaining of Equity-Based Compensation as of September 30, 2016			1 year 8 months 13 days
Unrecognized equity-based compensation	504	1,166	$ 504	1,166
Restricted stock \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	2,422	5,530	$ 9,439	18,352
Weighted Average Years Remaining of Equity-Based Compensation as of September 30, 2016			1 year 4 months 18 days
Unrecognized equity-based compensation	12,790	27,217	$ 12,790	27,217
SARs \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	10	61	$ 118	340
Weighted Average Years Remaining of Equity-Based Compensation as of September 30, 2016			3 years 5 months 23 days
Unrecognized equity-based compensation	127	185	$ 127	185
Cost of revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	21	48	75	104
Sales and marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	73	99	233	232
General and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	2,827	6,159	10,804	19,722
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 105	$ 158	$ 321	$ 337

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=66902209&loc=d3e3602-108585

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No definition available.

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