Equity-Based Compensation - Summary of Equity-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 3,765	$ 4,657
Unrecognized equity-based compensation	18,301	25,202
Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	3,145	4,082
Unrecognized equity-based compensation	11,328	19,323
Subsidiaries
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	620	575
Unrecognized equity-based compensation	$ 6,973	5,879
Weighted Average Years Remaining of Equity-Based Compensation as of March 31, 2017	2 years 10 months 14 days
DSUs \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 74	99
Unrecognized equity-based compensation	$ 356	869
Weighted Average Years Remaining of Equity-Based Compensation as of March 31, 2017	1 year 2 months 12 days
Restricted stock \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 3,061	3,925
Unrecognized equity-based compensation	$ 10,864	18,387
Weighted Average Years Remaining of Equity-Based Compensation as of March 31, 2017	1 year 15 days
SARs \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 10	58
Unrecognized equity-based compensation	$ 108	67
Weighted Average Years Remaining of Equity-Based Compensation as of March 31, 2017	3 years 12 days
Cost of revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 102	32
Sales and marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	92	88
General and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	3,489	4,423
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 82	$ 114

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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