Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Investments:
Equity securities	$ 3,312,228	$ 2,718,902
Debt securities	14,945,479	15,618,470
Short-term investments	594,958	714,208
Marketable Securities, Total	18,852,665	19,051,580
Commercial mortgage loans	639,621	670,239
Other invested assets	508,674	465,153
Total investments	20,000,960	20,186,972
Cash	1,197,474	791,442
Accrued investment income	90,724	88,760
Premium balances receivable	1,284,163	1,145,341
Reinsurance recoverables	1,829,187	1,781,096
Ceded unearned premiums	345,947	311,898
Deferred acquisition costs	637,086	595,117
Property and equipment at cost, net of accumulated depreciation and amortization	269,790	267,872
Goodwill	614,114	614,163
Intangible assets, net of amortization	774,797	787,462
Current taxes receivable	0	3,189
Funds held under reinsurance agreements	785,502	794,453
Other assets	1,556,139	1,559,245
Total assets	29,385,883	28,927,010
Liabilities, Redeemable Noncontrolling Interests and Stockholders’ Equity
Loss and loss adjustment expenses	13,293,046	12,970,626
Unearned premiums	3,176,795	2,984,060
Senior notes and other debt	2,080,288	2,135,946
Reinsurance payable	249,806	208,384
Current taxes payable	8,715	0
Net deferred tax liabilities	5,841	43,547
Other liabilities	1,641,948	1,594,918
Total liabilities	20,456,439	19,937,481
Redeemable noncontrolling interests	233,563	233,809
Common stock	17,460	17,460
Contributed capital	3,613,764	3,613,454
Accumulated other comprehensive income (loss)	224,190	452,402
Treasury stock	(1,707,908)	(1,645,930)
Retained earnings	6,548,375	6,318,334
Total stockholders’ equity attributable to Alleghany stockholders	8,695,881	8,755,720
Total liabilities, redeemable noncontrolling interests and stockholders’ equity	$ 29,385,883	$ 28,927,010