Leases - Balance Sheet Information and Weighted-Average Lease Terms and Discount Rates Related to Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019
Leases [Abstract]
Finance lease right-of-use assets, net of accumulated depreciation	$ 10,698
Finance lease liabilities	10,808
Operating lease right-of-use assets	32,762	$ 33,900
Operating lease liabilities	$ 33,878	$ 34,900
Weighted-average lease term
Finance leases	8 years 7 months 17 days
Operating leases	9 years 8 months 23 days
Weighted-average discount rate
Finance leases	3.02%
Operating leases	3.56%