Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 3,994	$ (502)	$ 5,213	$ 5,696
Income tax benefit arising from the release of adjustments to certain existing deferred tax asset valuation allowances			8,300
Unrecognized income tax benefits including interest and penalties	4,500		4,500
Portion of unrecognized income tax benefits, expected to be recognized upon settlement of tax examinations and the expiration of various statutes of limitations within next twelve months	$ 100		$ 100