Borrowings (Components of Interest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Interest expense, borrowings:
Interest expense	$ 18,542	$ 19,921
Capitalized interest	(551)	(167)
Amortization of transaction costs	743	753
Interest expense resulting from derivatives	3,366	3,641
Total interest expense	$ 22,100	$ 24,148