Borrowings (Components of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Interest expense, borrowings:
Interest expense	$ 41,911	$ 43,331
Capitalized interest	(4,434)	(5,499)
Amortization of transaction costs	1,297	1,053
Interest expense resulting from derivatives	747	3
Total interest expense	$ 39,521	$ 38,888