Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investments:
Debt securities available for sale, at fair value	$ 21,014,451	$ 19,732,825
Equity securities, at fair value	859,969	1,804,170
Other investments (portion measured at fair value: $1,644,197 and $1,973,550)	1,644,197	1,973,550
Investments accounted for using the equity method	3,774,310	3,077,611
Total investments	27,292,927	26,588,156
Cash	855,118	858,668
Accrued investment income	158,680	85,453
Investment in operating affiliates	964,604	1,135,655
Premiums receivable (net of allowance for credit losses: $35,402 and $39,958)	3,624,777	2,633,280
Reinsurance recoverable on unpaid and paid losses and loss adjustment expenses (net of allowance for credit losses: $21,544 and $13,230)	6,563,654	5,880,735
Contractholder receivables (net of allowance for credit losses: $2,691 and $3,437)	1,731,293	1,828,691
Ceded unearned premiums	1,799,197	1,729,455
Deferred acquisition costs	1,263,870	901,841
Receivable for securities sold	12,493	60,179
Goodwill and intangible assets	804,289	944,983
Other assets	2,919,605	2,453,849
Total assets	47,990,507	45,100,945
Liabilities
Reserve for losses and loss adjustment expenses	20,031,943	17,757,156
Unearned premiums	7,337,002	6,011,942
Reinsurance balances payable	1,529,919	1,583,253
Contractholder payables	1,733,984	1,832,127
Collateral held for insured obligations	249,238	242,352
Senior notes	2,725,410	2,724,394
Payable for securities purchased	95,041	64,850
Other liabilities	1,367,068	1,329,742
Total liabilities	35,069,605	31,545,816
Commitments and Contingencies
Redeemable noncontrolling interests	10,829	9,233
Shareholders’ Equity
Non-cumulative preferred shares	830,000	830,000
Common shares ($0.0011 par, shares issued: 588,250,762 and 583,289,850)	654	648
Additional paid-in capital	2,211,444	2,085,075
Retained earnings	15,892,065	14,455,868
Accumulated other comprehensive income (loss), net of deferred income tax	(1,646,170)	(64,600)
Common shares held in treasury, at cost (shares: 217,904,765 and 204,365,956)	(4,377,920)	(3,761,095)
Total shareholders' equity available to Arch	12,910,073	13,545,896
Total liabilities, noncontrolling interests and shareholders' equity	47,990,507	45,100,945
Fixed maturities available for sale, at fair value (amortized cost: $21,281,863 and $17,973,823; net of allowance for credit losses: $41,355 and $2,883)
Investments:
Debt securities available for sale, at fair value	19,682,789	17,998,109
Short-term investments available for sale, at fair value (amortized cost: $1,332,996 and $1,734,738; net of allowance for credit losses: $0 and $0 )
Investments:
Debt securities available for sale, at fair value	$ 1,331,662	$ 1,734,716