Leases Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Cash Flow, Operating Activities, Lessee [Abstract]
Operating Lease, Payments	$ 677	$ 664
Leases, Operating [Abstract]
Operating lease right-of-use assets	16,542		$ 17,006
Operating lease liabilities	$ 16,568		$ 17,007
Weighted-average remaining lease term	7 years 1 month		7 years 3 months
Weighted-average discount rate	3.08%		3.07%
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 2,476
Lessee, Operating Lease, Liability, Payments, Due Year Two	2,391
Lessee, Operating Lease, Liability, Payments, Due Year Three	2,099
Lessee, Operating Lease, Liability, Payments, Due Year Four	1,849
Lessee, Operating Lease, Liability, Payments, Due Year Five	1,407
Lessor, Operating Lease, Payments to be Received, Thereafter	9,085
Lessor, Operating Lease, Payments to be Received	19,307
Imputed Interest on Operating Leases	2,739
Lease, Cost [Abstract]
Operating lease cost	642	671
Short-term lease cost	46	23
Variable lease cost	169	224
Total lease cost	857	918
Income from subleases	(193)	(248)
Net lease cost	$ 664	$ 670