Income Taxes- Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Loss Carryforwards [Line Items]
Effective tax rate	56.00%	25.10%
Increase in income tax expense	$ 2.7
Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Open tax year	2015
State
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance of net operating loss carryforwards	$ 1.8
Reduction in deferred tax asset related to income tax credits	$ (0.9)