Equity-Based Compensation - Summary of Equity-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 4,082	$ 7,121	$ 9,125	$ 14,343
Unrecognized equity-based compensation	25,841	43,891	25,841	43,891
Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	3,236	6,319	7,318	13,137
Unrecognized equity-based compensation	16,811	34,599	16,811	34,599
Subsidiaries
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	846	802	$ 1,807	1,206
Weighted Average Years Remaining of Equity-Based Compensation as of June 30, 2016			2 years 10 months 2 days
Unrecognized equity-based compensation	9,030	9,292	$ 9,030	9,292
DSUs \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	94	19	$ 193	36
Weighted Average Years Remaining of Equity-Based Compensation as of June 30, 2016			1 year 11 months 13 days
Unrecognized equity-based compensation	578	1,166	$ 578	1,166
Restricted Stock \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	3,092	6,167	$ 7,017	12,822
Weighted Average Years Remaining of Equity-Based Compensation as of June 30, 2016			1 year 6 months 25 days
Unrecognized equity-based compensation	16,096	33,180	$ 16,096	33,180
SARs \| Parent Company
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	50	133	$ 108	279
Weighted Average Years Remaining of Equity-Based Compensation as of June 30, 2016			3 years 8 months 21 days
Unrecognized equity-based compensation	137	253	$ 137	253
Cost of revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	31	29	72	55
Sales and marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	88	79	192	137
General and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	3,851	6,887	8,625	13,980
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation	$ 112	$ 126	$ 236	$ 171

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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