Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 2,277		$ 1,486		$ 4,848	$ 1,995
Effective tax rate		12.30%		12.60%
Unrecognized Tax Benefits		$ 7,400					$ 6,400
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		$ 4,100					$ 3,500