Commitments and Contingencies - Additional Information (Details) ft² in Thousands, $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2017 USD ($) ft²	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Other Commitments [Line Items]
Rent expense		$ 2.7	$ 2.2
Subsequent Event
Other Commitments [Line Items]
Square feet of office space | ft²	58
Term of lease	12 years
Total amount of rent to be paid	$ 37.0