New Accounting Pronouncements (Details) $ in Millions		1 Months Ended
	Jan. 01, 2017 USD ($)	Feb. 29, 2016	May 31, 2014 item agreement
New Accounting Pronouncements or Change in Accounting Principle
Number Of Agreements | agreement			2
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle
Number Of Performance Obligations | item			1
Accounting Standards Update 2016-02 | Minimum
New Accounting Pronouncements or Change in Accounting Principle
Lease term		12 months
Accounting Standards Update 2016-09 | Long-term deferred tax assets, net
New Accounting Pronouncements or Change in Accounting Principle
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 1.4
Accounting Standards Update 2016-09 | Additional Paid-in Capital
New Accounting Pronouncements or Change in Accounting Principle
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 0.1