CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Investments:
Fixed maturities, available for sale, at fair value (Amortized cost 2019: $12,343,774; 2018: $11,616,312)	$ 12,522,955	$ 11,435,347
Equity securities, at fair value (Cost 2019: $377,895; 2018: $365,905)	433,407	381,633
Mortgage loans, held for investment, at fair value	394,179	298,650
Other investments, at fair value	802,064	787,787
Equity method investments	112,956	108,103
Short-term investments, at fair value	32,421	144,040
Total investments	14,297,982	13,155,560
Cash and cash equivalents	712,463	1,232,814
Restricted cash and cash equivalents	382,251	597,206
Accrued interest receivable	82,567	80,335
Insurance and reinsurance premium balances receivable	3,732,529	3,007,296
Reinsurance recoverable on unpaid losses and loss expenses	3,564,812	3,501,669
Reinsurance recoverable on paid losses and loss expenses	364,536	280,233
Deferred acquisition costs	657,275	566,622
Prepaid reinsurance premiums	1,291,979	1,013,573
Receivable for investments sold	25,850	32,627
Goodwill	102,003	102,003
Intangible assets	236,009	241,568
Value of business acquired	15,416	35,714
Operating lease right-of-use assets	132,940	0
Other assets	271,562	285,346
Total assets	25,870,174	24,132,566
Liabilities
Reserve for losses and loss expenses	12,254,711	12,280,769
Unearned premiums	4,503,132	3,635,758
Insurance and reinsurance balances payable	1,484,285	1,338,991
Senior notes	1,387,748	1,341,961
Payable for investments purchased	181,274	111,838
Operating lease liabilities	133,257	0
Other liabilities	359,290	393,178
Total liabilities	20,303,697	19,102,495
Shareholders’ equity
Preferred shares	775,000	775,000
Common shares (shares issued 2019: 176,580; 2018: 176,580 shares outstanding 2019: 83,947; 2018: 83,586)	2,206	2,206
Additional paid-in capital	2,303,592	2,308,583
Accumulated other comprehensive income (loss)	156,145	(177,110)
Retained earnings	6,108,577	5,912,812
Treasury shares, at cost (2019: 92,633; 2018: 92,994 shares)	(3,779,043)	(3,791,420)
Total shareholders’ equity	5,566,477	5,030,071
Total liabilities and shareholders’ equity	$ 25,870,174	$ 24,132,566