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

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_StockAppreciationRightsSARSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis=us-gaap_DeferredCompensationShareBasedPaymentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_SellingAndMarketingExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_GeneralAndAdministrativeExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_ResearchAndDevelopmentExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Equity-Based Compensation - Summary of Equity-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	$ 7,121	$ 6,739	$ 14,343	$ 10,615
Unrecognized Equity-Based Compensation	43,891		43,891
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	6,167	6,268	12,822	9,561
Unrecognized Equity-Based Compensation	33,180		$ 33,180
Weighted Average Years Remaining of Equity-Based Compensation			1 year 11 months 23 days
SARs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	133	201	$ 279	451
Unrecognized Equity-Based Compensation	253		$ 253
Weighted Average Years Remaining of Equity-Based Compensation			1 year 4 months 6 days
DSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	19	99	$ 36	245
Unrecognized 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	6,319	6,568	$ 13,137	10,257
Unrecognized Equity-Based Compensation	34,599		34,599
Subsidiaries
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	802	171	1,206	358
Unrecognized Equity-Based Compensation	9,292		$ 9,292
Weighted Average Years Remaining of Equity-Based Compensation			3 years 4 months 2 days
Cost of revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	29	20	$ 55	39
Sales and marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	79	42	137	83
General and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	6,887	6,648	13,980	10,294
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-Based Compensation	$ 126	$ 29	$ 171	$ 199