Income Taxes - Changes In Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning-of-year	$ 934	$ 762	$ 0
Gross increases - tax positions in prior period	0	934	1,108
Gross decreases - tax positions in prior period	0	(762)	0
Gross increases - tax positions in current period	0	0	74
Lapse of statute of limitations	(181)	0	0
Change in tax rate	0	0	(420)
Balance at end-of-year	$ 753	$ 934	$ 762