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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Investments: |  |
Fixed maturities, available for sale, at fair value (Amortized cost 2019: $11,834,207; 2018: $11,616,312) | $ 11,874,518 | $ 11,435,347
Equity securities, at fair value (Cost 2019: $376,493; 2018: $365,905) | 418,863 | 381,633
Mortgage loans, held for investment, at fair value | 313,421 | 298,650
Other investments, at fair value | 795,331 | 787,787
Equity method investments | 110,322 | 108,103
Short-term investments, at fair value | 41,853 | 144,040
Total investments | 13,554,308 | 13,155,560
Cash and cash equivalents | 1,151,182 | 1,232,814
Restricted cash and cash equivalents | 455,076 | 597,206
Accrued interest receivable | 78,594 | 80,335
Insurance and reinsurance premium balances receivable | 3,667,923 | 3,007,296
Reinsurance recoverable on unpaid losses | 3,555,341 | 3,501,669
Reinsurance recoverable on paid losses | 321,798 | 280,233
Deferred acquisition costs | 703,028 | 566,622
Prepaid reinsurance premiums | 1,271,303 | 1,013,573
Receivable for investments sold | 10,888 | 32,627
Goodwill | 102,003 | 102,003
Intangible assets | 238,763 | 241,568
Value of business acquired | 22,610 | 35,714
Operating lease right-of-use assets | 143,887 | 0
Other assets | 280,878 | 285,346
Total assets | 25,557,582 | 24,132,566
Liabilities |  |
Reserve for losses and loss expenses | 12,275,771 | 12,280,769
Unearned premiums | 4,535,163 | 3,635,758
Insurance and reinsurance balances payable | 1,440,942 | 1,338,991
Senior notes | 1,342,345 | 1,341,961
Payable for investments purchased | 159,544 | 111,838
Operating lease liabilities | 144,298 | 0
Other liabilities | 359,363 | 393,178
Total liabilities | 20,257,426 | 19,102,495
Shareholders’ equity |  |
Preferred shares | 775,000 | 775,000
Common shares (shares issued 2019: 176,580; 2018: 176,580 shares outstanding 2019: 83,934; 2018: 83,586) | 2,206 | 2,206
Additional paid-in capital | 2,296,639 | 2,308,583
Accumulated other comprehensive income (loss) | 29,096 | (177,110)
Retained earnings | 5,976,603 | 5,912,812
Treasury shares, at cost (2019: 92,646; 2018: 92,994 shares) | (3,779,388) | (3,791,420)
Total shareholders’ equity | 5,300,156 | 5,030,071
Total liabilities and shareholders’ equity | $ 25,557,582 | $ 24,132,566

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- Definition Amount payable to broker-dealers and clearing organizations, including, but not limited to, securities failed-to-receive, certain deposits received for securities loaned, open transactions, and floor-brokerage payables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35710130&loc=d3e41645-110958 + Details
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- Definition The carrying amount as of the balance sheet date due the entity from (a) agents and insureds, (b) uncollected premiums and (c) others, net of the allowance for doubtful accounts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),5) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35710130&loc=d3e41645-110958 + Details
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- Definition Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 + Details
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