Income Taxes - Textuals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 9,235	$ (3,660)	$ 19,494	$ (20,073)