Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Investments:
Debt securities available for sale, at fair value	$ 20,061,584	$ 19,732,825
Equity securities, at fair value	809,869	1,804,170
Other investments, at fair value	1,578,751	1,973,550
Investments accounted for using the equity method	3,565,946	3,077,611
Total investments	26,016,150	26,588,156
Cash	813,583	858,668
Accrued investment income	116,263	85,453
Investment in operating affiliates	891,212	1,135,655
Premiums receivable (net of allowance for credit losses: $38,229 and $39,958)	3,579,380	2,633,280
Reinsurance recoverable on unpaid and paid losses and loss adjustment expenses (net of allowance for credit losses: $17,366 and $13,230)	6,356,456	5,880,735
Contractholder receivables (net of allowance for credit losses: $2,360 and $3,437)	1,735,730	1,828,691
Ceded unearned premiums	2,115,539	1,729,455
Deferred acquisition costs	1,122,711	901,841
Receivable for securities sold	27,042	60,179
Goodwill and intangible assets	806,655	944,983
Other assets	2,756,383	2,453,849
Total assets	46,337,104	45,100,945
Liabilities
Reserve for losses and loss adjustment expenses	19,288,291	17,757,156
Unearned premiums	7,271,279	6,011,942
Reinsurance balances payable	1,669,592	1,583,253
Contractholder payables	1,738,089	1,832,127
Collateral held for insured obligations	254,720	242,352
Senior notes	2,725,153	2,724,394
Payable for securities purchased	174,769	64,850
Other liabilities	1,411,193	1,329,742
Total liabilities	34,533,086	31,545,816
Commitments and Contingencies
Redeemable noncontrolling interests	8,908	9,233
Shareholders' Equity
Non-cumulative preferred shares	830,000	830,000
Common shares ($0.0011 par, shares issued: 587,134,047 and 583,289,850)	652	648
Additional paid-in capital	2,186,599	2,085,075
Retained earnings	15,042,561	14,455,868
Accumulated other comprehensive income (loss), net of deferred income tax	(1,891,827)	(64,600)
Common shares held in treasury, at cost (shares: 217,812,057 and 204,365,956)	(4,372,875)	(3,761,095)
Total shareholders' equity available to Arch	11,795,110	13,545,896
Total liabilities, noncontrolling interests and shareholders' equity	46,337,104	45,100,945
Fixed maturities available for sale, at fair value (amortized cost: $19,913,055 and $17,973,823; net of allowance for credit losses: $45,993 and $2,883)
Investments:
Debt securities available for sale, at fair value	18,120,727	17,998,109
Short-term investments available for sale, at fair value (amortized cost: $1,941,071 and $1,734,738; net of allowance for credit losses: $0 and $0)
Investments:
Debt securities available for sale, at fair value	$ 1,940,857	$ 1,734,716