Income Taxes - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0		$ 4,400,000
Unrecognized tax benefit that would not impact effective tax rate, tax position with uncertain timing of deductibility			3,700,000
Unrecognized tax benefits, interest on income taxes accrued			$ 700,000
Income taxes paid, net of refunds	$ 52,200,000	$ 10,200,000