Tangible Equity Units (Narrative) (Details) $ / shares in Units, $ in Thousands	1 Months Ended	6 Months Ended
	Jul. 31, 2019 USD ($) $ / shares shares	Sep. 30, 2021 shares	Sep. 30, 2020 shares
Tangible Equity Units [Line Items]
Conversion to shares		3.2051
Senior Amortizing Note [Member]
Tangible Equity Units [Line Items]
Maturity date		Jun. 30, 2022
Settlement date		Jun. 30, 2022
Tangible Equity Units [Member]
Tangible Equity Units [Line Items]
Tangible equity unit offering | shares	5,750,000
Total proceeds, net of issuance costs | $	$ 278,875
TEU price per share | $ / shares	$ 50