Nature of Business and Summary of Significant Accounting Policies - Schedule of Revenue by Geographical Region (Detail) - Geographic Concentration Risk [Member] - Sales [Member]	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Americas [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentages of revenue by geographic regions	55.00%	56.00%	59.00%
EMEA [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentages of revenue by geographic regions	26.00%	26.00%	24.00%
Asia-Pacific [Member]
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentages of revenue by geographic regions	19.00%	18.00%	17.00%

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.

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=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

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