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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions	3 Months Ended				6 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2016 Client	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Client	Sep. 30, 2015 USD ($)	Dec. 31, 2016 Client	Dec. 31, 2015 USD ($) Client	Mar. 31, 2016 USD ($)	Jun. 30, 2016 Client
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Number of clients accounted for more than 10% of net revenue	1		0		1	0
Number of clients accounted for more than 10% of net accounts receivable					0			0
Customer Concentration Risk [Member] | Net revenue [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Percentage of revenue accounted by major clients	10.00%				11.00%
Market-based Restricted Stock Units [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Stock-based compensation understated | $		$ 0.4	$ 0.4	$ 0.3		$ 0.7	$ 1.1

X

- Definition

The number of customers with receivables greater than ten percent of total receivables.

+ References

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The number of customers with revenue greater than ten percent of net sales.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

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-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
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Amount of each individual error being corrected in the correcting adjustment.

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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.

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