Leases - Operating Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Right-of-use assets	$ 30,447	$ 32,539
Lease liabilities	$ 33,803	$ 35,525
Weighted average remaining lease term (in years)	13 years 11 months 4 days	14 years 25 days
Weighted average discount rate	3.44%	3.40%