New and Recently Adopted Accounting Standards - Additional Information (Details) - ASU 2016-09	3 Months Ended	6 Months Ended
Jun. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Excess tax benefits from share-based compensation	$ 6,000,000	$ 6,300,000
Unrecognized excess tax benefits	$ 0	$ 0

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant