CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Net premiums	$ 2,737,813	$ 2,582,551
Investment income, net of related expenses	579,877	516,329
Investment related gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(9,453)	0
Other investment related gains (losses), net	17,241	(470)
Total investment related gains (losses), net	7,788	(470)
Other revenues	94,553	75,297
Total revenues	3,420,031	3,173,707
Benefits and Expenses:
Claims and other policy benefits	2,508,324	2,362,101
Interest credited	133,189	80,449
Policy acquisition costs and other insurance expenses	311,881	356,902
Other operating expenses	201,483	191,274
Interest expense	40,173	37,454
Collateral finance and securitization expense	8,417	7,602
Total benefits and expenses	3,203,467	3,035,782
Income before income taxes	216,564	137,925
Provision for income taxes	47,057	37,695
Net income	$ 169,507	$ 100,230
Earnings per share:
Basic earnings per share	$ 2.70	$ 1.55
Diluted earnings per share	$ 2.65	$ 1.52