Leases - Summary of Maturity Analysis of Operating and Finance Lease Liabilities and Reconciliation of Undiscounted Cash Flows (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating lease payments due:
Within one year	$ 2,426	$ 2,445
After one but within two years	2,042	2,426
After two but within three years	1,863	2,179
After three but within four years	1,476	2,013
After four but within five years	1,249	1,632
After five years	3,626	8,543
Total undiscounted cash flows	12,682
Discount on cash flows	(1,319)
Total lease liability	11,363	11,200
Finance lease payments due:
Within one year	217
After one but within two years	217
After two but within three years	252
After three but within four years	259
After four but within five years	259
After five years	3,473
Total undiscounted cash flows	4,677
Discount on cash flows	(1,297)
Total lease liability	$ 3,380	$ 3,467