Employee Benefit Plans - Summary of Changes in Benefit Obligations of Defined Benefit Plan Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2021
Employee Benefit Plans
Benefit obligation, beginning of year	$ 3,845	$ 3,571	$ 3,845
Reduction in service cost	(34)		$ (137)
Service cost		31
Interest cost	34	37
Benefit obligation, end of year	$ 3,845	$ 3,639