Property and Equipment - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Property Plant And Equipment [Abstract]
Depreciation expense	$ 3.7	$ 2.3
Amortization expense of capitalized internal-use software	1.7	$ 1.5
Carrying value of capitalized internal-use software	14.3		$ 14.1
Capitalized internal-use software included in construction in progress	$ 1.3		$ 1.5