Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Statement of Comprehensive Income [Abstract]
Net unrealized holding gains (losses) on investments arising during the period, tax provision (benefit)	$ (159)	$ (16)	$ (336)	$ (43)
Net change in unrealized holding gains (losses) on investments, tax provision (benefit)	(159)	(16)	(336)	(43)
Net unrealized foreign exchange gains (losses) arising during the period, tax provision (benefit)	(6,605)	(2,942)	(15,095)	1,659
Net change in unrealized foreign exchange gains (losses), tax provision (benefit)	(6,605)	(2,942)	(15,095)	1,659
Net unrealized gains (losses) on instrument specific credit risk arising during the period, tax provision (benefit)	(2,354)	4,352	22,380	(24,157)
Less: reclassification adjustment for instrument specific credit risk (gains) losses included in net income (loss), tax provision (benefit)	(44)	(321)	(52)	599
Net change in unrealized instrument specific credit risk gains (losses), tax provision (benefit)	(2,310)	4,673	22,432	(24,756)
Net pension gains (losses) arising during the period, tax provision (benefit)	0	0	0	0
Less: reclassification adjustment for pension (gains) losses included in net income (loss), tax provision (benefit)	(212)	(270)	(624)	(795)
Net change in pension liability, tax provision (benefit)	$ 212	$ 270	$ 624	$ 795