Borrowings (Components of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Interest expense, borrowings:
Interest expense	$ 24,303	$ 18,542
Capitalized interest	(1,313)	(551)
Amortization of transaction costs	843	743
Interest expense resulting from derivatives	2,811	3,366
Total interest expense	$ 26,644	$ 22,100