Condensed Consolidated Balance Sheets (Unaudited) Statement - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
ASSETS
Fixed-maturities available for sale—at fair value (amortized cost $4,369,273 and $4,098,962)	$ 4,527,223	$ 4,021,575
Trading securities—at fair value (amortized cost of $307,891 and $468,696)	329,935	469,071
Equity securities—at fair value (cost of $119,408 and $139,377)	121,759	130,565
Short-term investments—at fair value (includes $34,767 and $11,699 of reinvested cash collateral held under securities lending agreements)	552,095	528,403
Other invested assets—at fair value	2,712	3,415
Total investments	5,533,724	5,153,029
Cash	49,393	95,393
Restricted cash	2,853	11,609
Accounts and notes receivable	144,113	78,652
Deferred income taxes, net (Note 9)	0	131,643
Goodwill and other acquired intangible assets, net (Note 6)	52,533	58,998
Prepaid reinsurance premium	374,339	417,628
Other assets (Note 8)	513,647	367,700
Total assets	6,670,602	6,314,652
Liabilities and Stockholders’ Equity
Unearned premiums	647,856	739,357
Reserve for losses and loss adjustment expense (Note 10)	398,141	401,361
Senior notes (Note 11)	886,643	1,030,348
FHLB advances (Note 11)	104,492	82,532
Reinsurance funds withheld	352,532	321,212
Other liabilities	358,431	251,127
Total liabilities	2,748,095	2,825,937
Commitments and contingencies (Note 12)
Stockholders’ equity
Common stock: par value $0.001 per share; 485,000 shares authorized at September 30, 2019 and December 31, 2018; 220,174 and 231,132 shares issued at September 30, 2019 and December 31, 2018, respectively; 202,219 and 213,473 shares outstanding at September 30, 2019 and December 31, 2018, respectively	220	231
Treasury stock, at cost: 17,955 and 17,660 shares at September 30, 2019 and December 31, 2018, respectively	(901,556)	(894,870)
Additional paid-in capital	2,469,097	2,724,733
Retained earnings	2,229,107	1,719,541
Accumulated other comprehensive income (loss) (Note 14)	125,639	(60,920)
Total stockholders’ equity	3,922,507	3,488,715
Total liabilities and stockholders’ equity	$ 6,670,602	$ 6,314,652