Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 12,601	$ 11,054	$ 17,814	$ 16,750
Income tax benefit arising from the release of adjustments to certain existing deferred tax asset valuation allowances	(2,800)		8,300
Unrecognized income tax benefits including interest and penalties	$ 4,400		$ 4,400