Leases - Balance Sheet Information and Weighted-Average Lease Terms and Discount Rates Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Finance lease right-of-use assets, net of accumulated depreciation	$ 9,326	$ 11,200	$ 0
Finance lease liabilities	9,520	11,200
Operating lease right-of-use assets	31,182	33,900
Operating lease liabilities	$ 32,354	$ 34,900
Weighted-average lease term
Finance leases	8 years 7 months 13 days
Operating leases	9 years 18 days
Weighted-average discount rate
Finance leases	3.01%
Operating leases	3.51%