Restricted Cash - Summary (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018
Cash and Cash Equivalents [Abstract]
Compensating balance for short-term borrowings	$ 1,938	$ 1,225	$ 1,256
Capital investments	0	0	850
Escrow	2,318	2,894	0
Other	904	1,648	580
Total	$ 5,160	$ 5,767	$ 2,686