Leases - Lease Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost (cost resulting from lease payments)	$ 8,868	$ 10,826
Short-term lease cost	93	161
Variable lease cost (cost excluded from lease payments)	1,195	1,776
Sublease income	(658)	(583)
Net lease cost	9,498	12,180
Operating lease - operating cash flows (fixed payments)	8,666	9,811
Operating lease - operating cash flows (liability reduction)	$ 6,640	$ 7,187
Weighted average lease term - operating leases (in years) (at period end)	17 years 3 months	15 years 11 months 26 days
Weighted average discount rate - operating leases (at period end)	3.01%	3.17%
Right-of-use assets obtained in exchange for new lease liabilities - operating leases	$ 8,142	$ 9,393