Income Taxes Income Taxes - Unrecognized Tax Benefit Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Beginning balance	$ 19,560	$ 21,400	$ 9,665
Additions based on tax positions related to current year	2,227	1,893	2,002
Additions based on tax positions related to prior years	2,047	450	9,887
Reductions based on settlement refunds from government authorities	(4,414)	(3,461)	(154)
Reductions based on tax positions related to prior years	(51)	(20)	0
Reductions based on lapse of statute of limitations	(916)	(702)	0
Ending balance	$ 18,453	$ 19,560	$ 21,400