Leases - Balance Sheet Information and Weighted-Average Lease Terms and Discount Rates Related to Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Leases [Abstract]
Finance lease right-of-use assets, net of accumulated depreciation	$ 8,348	$ 9,326
Finance lease liabilities	8,616	9,520
Operating lease right-of-use assets	29,819	31,182
Operating lease liabilities	$ 31,076	$ 32,354
Weighted-average lease term
Finance leases	8 years 6 months 29 days	8 years 7 months 13 days
Operating leases	8 years 8 months 19 days	9 years 18 days
Weighted-average discount rate
Finance leases	3.05%	3.01%
Operating leases	3.49%	3.51%