Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income Per Share from Continuing Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2019	Nov. 30, 2018
Basic net income per common share:
Net income available to common shareholders	$ 52,725	$ 712	$ 61,408	$ 23,824
Diluted net income per common share:
Net income available to common shareholders	$ 52,725	$ 712	$ 61,408	$ 23,824
Basic shares:
Basic weighted average common shares outstanding (in shares)	12,937	12,609	12,846	12,565
Impact of equity awards (in shares)				921
Diluted shares:
Diluted weighted average common shares outstanding (in shares)	12,937	12,609	12,846	13,486
Basic net income per common share:
Basic net income per common share (in dollars per share)	$ 4.08	$ 0.06	$ 4.78	$ 1.90
Diluted net income per common share:
Diluted net income per common share (in dollars per share)	$ 4.08	$ 0.06	$ 4.78	$ 1.77