Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flow from operating activities:
Net earnings	$ 112,968	$ 80,569
Adjustments to reconcile net earnings to cash provided by operations:
Depreciation	68,999	63,641
Amortization of deferred policy acquisition costs	3,683	2,811
Change in allowance for losses on trade receivables	(14)	(102)
Change in allowance for inventory reserves	(935)	695
Net of (gains) losses on sale of real and personal property	(11,565)	(7,516)
Net (gain) loss on sale of investments	(1,776)	39
Deferred income tax	31,828	4,641
Net change in other operating assets and liabilities:
Reinsurance recoverables and trade receivables	(22,715)	23,486
Inventories	(973)	(5,398)
Prepaid expenses	14,098	267
Capitalization of deferred policy acquisition costs	(7,808)	(5,420)
Other assets	(4,532)	20,518
Related party assets	24,878	144,890
Accounts payable and accrued expenses	18,162	47,981
Policy benefits and losses, claims and loss expenses payable	1,609	(24,242)
Other policyholders' funds and liabilities	(180)	(1,884)
Deferred income	7,584	6,457
Related party liabilities	5,962	1,448
Net cash provided by operating activities	239,273	352,881
Purchase of:
Property, plant and equipment	(275,156)	(157,786)
Short term investments	(64,652)	(60,395)
Fixed maturities investments	(66,855)	(50,553)
Equity securities	(388)	0
Preferred stock	(634)	0
Real estate	(131)	0
Mortgage loans	(12,904)	(14,452)
Proceeds from sale of:
Property, plant and equipment	93,239	62,426
Short term investments	64,818	59,421
Fixed maturities investments	41,491	23,978
Equity securities	904	0
Preferred stock	3,295	1,003
Real estate	0	4
Mortgage loans	23,258	11,547
Net cash used by investing activities	(193,715)	(124,807)
Cash flow from financing activities:
Borrowings from credit facilities	88,182	26,187
Principal repayments on credit facilities	(61,996)	(61,142)
Debt issuance costs	(232)	0
Capital lease payments	(10,449)	(3,888)
Leveraged Employee Stock Ownership Plan - repayments from loan	127	162
Securitization deposits	0	(908)
Investment contract deposits	34,742	28,993
Investment contract withdrawals	(6,754)	(7,967)
Net cash used by financing activities	43,620	(18,563)
Effects of exchange rate on cash	(335)	(376)
Increase (decrease) in cash and cash equivalents	88,843	209,135
Cash and cash equivalents at the beginning of period	463,744	357,180
Cash and cash equivalents at the end of the period	$ 552,587	$ 566,315