UNAUDITED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investments:
Fixed maturities available for sale (''AFS''), at fair value (amortized cost: 2018 - $30,268,346; 2017 - $30,157,581)	$ 30,656,628	$ 30,928,988
Short-term investments AFS, at fair value (amortized cost: 2018 - $500,844; 2017 - $816,638)	500,170	815,481
Fixed maturities trading, at fair value (amortized cost: 2018 - $2,055,722; 2017 - $1,946,501)	2,084,251	2,006,385
Short-term investments trading, at fair value (amortized cost: 2018 - $7,428; 2017 - $14,969)	7,425	14,965
Equity securities, at fair value (cost: 2018 - $607,427; 2017 - $638,455)	637,872	713,967
Investments in affiliates	1,900,105	1,911,996
Other investments	1,186,983	1,163,863
Total investments	36,973,434	37,555,645
Cash and cash equivalents	3,484,763	3,435,954
Restricted cash	155,023	157,497
Accrued investment income	265,701	272,149
Deferred acquisition costs and value of business acquired	1,317,797	1,102,474
Ceded unearned premiums	2,950,077	2,198,217
Premiums receivable	7,988,469	6,934,482
Reinsurance balances receivable	1,210,620	930,114
Unpaid losses and loss expenses recoverable	7,271,013	7,247,723
Receivable from investments sold	258,084	201,515
Goodwill and other intangible assets	2,230,506	2,225,751
Deferred tax asset	356,667	332,024
Other assets	875,809	842,691
Total assets	65,337,963	63,436,236
Liabilities:
Unpaid losses and loss expenses	29,701,568	29,696,779
Deposit liabilities	982,963	1,042,677
Future policy benefit reserves	3,680,958	3,610,926
Funds withheld on GreyCastle life retrocession arrangements (net of future policy benefit reserves recoverable: 2018 - $3,261,122; 2017 - $3,191,584)	989,140	999,219
Unearned premiums	9,687,293	8,307,431
Notes payable and debt	3,240,461	3,220,769
Reinsurance balances payable	4,432,331	3,706,116
Payable for investments purchased	317,339	332,989
Deferred tax liability	57,995	57,574
Other liabilities	1,012,693	1,000,436
Total liabilities	54,102,741	51,974,916
Commitments and Contingencies
Shareholders' Equity:
Authorized shares, 999,990,000, par value $0.01; common shares issued and outstanding (2018 - 258,171,836; 2017 - 256,033,895)	2,582	2,560
Additional paid in capital	7,809,895	7,757,940
Accumulated other comprehensive income	312,255	889,431
Retained earnings	1,503,797	1,198,386
Shareholders' equity attributable to XL Group Ltd	9,628,529	9,848,317
Non-controlling interest in equity of consolidated subsidiaries	1,606,693	1,613,003
Total shareholders' equity	11,235,222	11,461,320
Total liabilities and shareholders' equity	$ 65,337,963	$ 63,436,236