Accounting Policies Recently Adopted and Pending Accounting Pronouncements - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Operating lease right-of-use assets	$ 33,180	$ 33,900
Operating lease liabilities	$ 34,319	34,900
Finance lease right-of-use assets, net of accumulated depreciation		11,200
Finance lease liabilities		$ 11,200
Percentage of right of use asset of total assets		0.30%