Leases - Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Operating leases - Property	$ 36,442	$ 27,864
Finance leases - Property	40,432	40,458
Total right-of-use assets	76,874	68,322
Property - operating lease liabilities	26,382	17,317
Finance leases - Property	28	702
Total lease liabilities	$ 26,410	$ 18,019