Borrowings (Components of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Interest expense, borrowings:
Interest expense	$ 43,331	$ 34,196
Capitalized interest	(5,499)	(419)
Amortization of transaction costs	1,053	961
Interest expense resulting from derivatives	$ 3	$ 516