Income Taxes (Deferred Tax Assets and Liabilities by Balance Sheet Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets and Liabilities by Balance Sheet Classification [Abstract]
Deferred tax assets	$ 361,814	$ 136,998
Deferred tax liabilities	(2,630)	(15,075)
Total net deferred tax assets	$ 359,184	$ 121,923