Income Taxes - Summary of Changes to Unrecognized Tax Benefits (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]
Unrecognized tax benefit at the beginning of the year	$ 4,334	$ 4,440
Reductions as a result of lapse of applicable statute of limitations	(1,882)	(106)
Unrecognized tax benefits at the end of the year	$ 2,452	$ 4,334