Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021
Cash flows from operating activities:
Net income	$ 307,362	$ 684,055
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred loan fees	(6,233)	(7,144)
Amortization of debt issuance costs and deferred charges	7,412	8,224
Amortization of discount on long-term debt	9,656	8,832
Amortization of issuance costs for bank revolving lines of credit	3,290	3,317
Depreciation and amortization	5,811	5,825
(Benefit) provision for credit losses	(12,146)	34,987
Loss on early extinguishment of debt	696	1,455
Unrealized losses (gains) on equity and debt securities	17,619	(36)
Derivative forward value gains	(122,930)	(558,266)
Changes in operating assets and liabilities:
Accrued interest receivable	(2,628)	5,317
Accrued interest payable	47,734	36,005
Deferred income	787	1,327
Other	(508)	(3,100)
Net cash provided by operating activities	255,922	220,798
Cash flows from investing activities:
Advances on loans, net	(1,093,256)	(1,624,817)
Investments in fixed assets, net	(12,363)	(5,156)
Purchase of trading securities	(122,116)	(350,899)
Proceeds from sales and maturities of trading securities	114,419	84,271
Proceeds from redemption of equity securities	0	30,000
Net cash used in investing activities	(1,113,316)	(1,866,601)
Cash flows from financing activities:
Proceeds from short-term borrowings ≤ 90 days, net	31,983	779,124
Proceeds from short-term borrowings with original maturity > 90 days	1,975,416	2,260,900
Repayments of short-term borrowings with original maturity > 90 days	(2,161,438)	(2,594,052)
Payments for issuance costs for revolving bank lines of credit	(3,563)	0
Proceeds from issuance of long-term debt, net of discount and issuance costs	3,395,920	2,380,354
Payments for retirement of long-term debt	(2,494,226)	(1,553,744)
Payments made for early extinguishment of debt	(696)	(1,455)
Proceeds from issuance of members’ subordinated certificates	359	14,288
Payments for retirement of members’ subordinated certificates	(21,183)	(82,291)
Payments for retirement of patronage capital	(57,761)	(59,888)
Additions for membership fees, net	0	1
Net cash provided by financing activities	664,811	1,143,237
Net decrease in cash, cash equivalents and restricted cash	(192,583)	(502,566)
Beginning cash, cash equivalents and restricted cash	303,361	680,019
Ending cash, cash equivalents and restricted cash	110,778	177,453
Supplemental disclosure of cash flow information:
Cash paid for interest	451,179	467,621
Cash paid for income taxes	$ 3	$ 156