Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
Sep. 30, 2016 USD ($)
Loss Contingencies [Line Items]
Business combination, final purchase price	$ 28,100,000
Loss contingency accrual	500,000
Minimum [Member]
Loss Contingencies [Line Items]
Business combination, final purchase price	27,900,000
Maximum [Member]
Loss Contingencies [Line Items]
Business combination, final purchase price	$ 29,900,000

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration