Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flow from operating activities:
Net earnings	$ 1,036,539	$ 537,076
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	519,181	495,794
Amortization of deferred policy acquisition costs	23,520	19,012
Amortization of premiums and accretion of discounts related to investments, net	14,486	10,197
Amortization of debt issuance costs	4,200	4,645
Interest credited to policyholders	47,181	38,672
Change in allowance for losses on trade receivables	1,243	(574)
Change in allowance for inventory reserves	9,799	3,259
Net gain on sale of real and personal property	(157,980)	(40,083)
Net losses on disposal of real estate	(2,930)	4,293
Net (gain) loss on sale of investments	(3,495)	(5,644)
Net losses on equity investments	(3,695)	669
Deferred income tax	130,760	117,025
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(7,371)	(39,499)
Inventories	(70,796)	(6,349)
Prepaid expenses	257,591	112,428
Capitalization of deferred policy acquisition costs	(25,703)	(24,903)
Other assets	1,178	30,120
Related party assets	(18,683)	(20,794)
Accounts payable and accrued expenses	33,258	97,151
Policy benefits and losses, claims and loss expenses payable	6,411	14,096
Other policyholders' funds and liabilities	(2,810)	24,677
Deferred income	(526)	6,851
Related party liabilities	(2,207)	(1,566)
Net cash provided by operating activities	1,789,151	1,376,553
Cash flow from investing activities:
Escrow deposits	5,695	(1,978)
Purchase of:
Property, plant and equipment	(1,652,984)	(961,995)
Short term investments	(31,074)	(38,790)
Fixed maturity investments	(448,283)	(352,307)
Equity securities	(1,380)	(838)
Preferred stock	(8,000)	(16,144)
Real estate	(190)	(274)
Mortgage loans	(131,633)	(92,281)
Proceeds from sale of:
Property, plant and equipment	483,783	434,860
Short term investments	20,669	38,830
Fixed maturity investments	284,347	331,407
Equity securities	2,026	72
Preferred stock	2,000	1,200
Mortgage loans	28,064	4,744
Net cash used by investing activities	(1,446,960)	(653,494)
Cash flow from financing activities:
Borrowings from credit facilities	1,202,412	790,532
Principal repayments on credit facilities	(333,419)	(568,068)
Payment of debt issuance costs	(8,006)	(5,020)
Capital lease payments	(129,150)	(173,520)
Securitization deposits		(49,019)
Common stock dividends paid	(29,412)	(49,019)
Net contribution from (to) related party	0	22,600
Investment contract deposits	271,657	326,055
Investment contract withdrawals	(177,777)	(169,008)
Net cash provided by (used in) financing activities	796,305	174,552
Effects of exchange rate on cash	(5,046)	6,877
Increase (decrease) in cash and cash equivalents	1,133,450	904,488
Cash and cash equivalents at the beginning of period	1,194,012	494,352
Cash and cash equivalents at the end of the period	$ 2,327,462	$ 1,398,840