Income Taxes - Reconciliation of Uncertain Tax Positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance - beginning of year	$ 679	$ 652
Additions based on tax positions related to the current year	50	58
Additions for tax positions of prior years	43	118
Reductions for tax positions of prior years		(53)
Settlements	(375)
Lapse in statutes of limitations	(99)	(96)
Uncertain tax positions, ending balance	$ 233	$ 679