Derivatives (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent [Abstract]
Interest expense	$ 67,218	$ 60,598
Investment Income, Net	1,400	1,600
Decrease, fair value, cash flow hedges
AOCI Attributable to Parent [Abstract]
Interest expense	1,900	3,800
Reclassified AOCI
AOCI Attributable to Parent [Abstract]
Interest expense	1,100	$ 900
Reclassification net gains Interest Rate Contracts
AOCI Attributable to Parent [Abstract]
Interest expense	$ 5,500