Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING ACTIVITIES:
Net earnings	$ 54,605	$ 53,492
Adjustments to reconcile net earnings to cash flows provided by (used in) operating activities:
Realized losses (gains) on sale of investments	1,417	(12,689)
Unrealized losses (gains) on investments	(39,381)	(30,331)
Other non-cash items	1,053	2,773
Depreciation and other amortization	13,629	14,024
Net change in trading securities held on behalf of policyholders	(1,093)	1,580
Sales and maturities of trading securities	655,590	926,919
Purchases of trading securities	(732,815)	(1,187,652)
Changes in:
Reinsurance balances recoverable	72,596	36,691
Funds held by reinsured companies	(4,255)	18,552
Losses and loss adjustment expenses	(165,467)	(34,221)
Policy benefits for life and annuity contracts	(11,468)	(9,603)
Insurance and reinsurance balances payable	10,207	20,555
Unearned premiums	24,682	38,041
Other operating assets and liabilities	(41,388)	(57,536)
Net cash flows provided by (used in) operating activities	(162,088)	(219,405)
INVESTING ACTIVITIES:
Acquisitions, net of cash acquired	0	140,458
Sales and maturities of available-for-sale securities	25,846	49,241
Purchase of available-for-sale securities	(3,582)	(24,484)
Maturities of held-to-maturity securities	271	5,239
Movement in restricted cash and cash equivalents	4,547	39,740
Purchase of other investments	(17,773)	(78,895)
Redemption of other investments	94,836	13,882
Other investing activities	(1,219)	(233)
Net cash flows provided by (used in) investing activities	102,926	144,948
FINANCING ACTIVITIES:
Receipt of loans	0	109,000
Repayment of loans	(20,500)	0
Net cash flows provided by (used in) financing activities	(20,500)	109,000
EFFECT OF EXCHANGE RATE CHANGES ON FOREIGN CURRENCY CASH AND CASH EQUIVALENTS	3,790	(15,444)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(75,872)	19,099
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	821,925	963,402
CASH AND CASH EQUIVALENTS, END OF PERIOD	746,053	982,501
Supplemental Cash Flow Information:
Income taxes paid, net of refunds	10,687	11,715
Interest paid	$ 4,534	$ 4,003