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Condensed Consolidated Balance Sheets (Unaudited) Statement - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
ASSETS |  |  |
Fixed-maturities available for sale—at fair value (amortized cost $3,838,823 and $3,426,217) |  | $ 3,763,710 | $ 3,458,719
Trading Securities—at fair value |  | 493,956 | 606,401
Equity Securities-at fair value |  | 121,865 |
Equity securities available for sale—at fair value (at December 31, 2017, classified as available for sale with related cost of $163,106) |  |  | 162,830
Short-term investments—at fair value (includes $31,799 and $19,357 of reinvested cash collateral held under securities lending agreements) |  | 645,119 | 415,658
Other invested assets—at fair value (amortized cost at December 31, 2017) |  | 3,585 | 334
Total investments |  | 5,028,235 | 4,643,942
Cash |  | 104,413 | 80,569
Restricted cash |  | 9,925 | 15,675
Accounts and notes receivable |  | 108,003 | 72,558
Property, Plant and Equipment, Net | [1] | 38,060 | 38,291
Deferred income taxes, net (Note 9) |  | 134,201 | 229,567
Goodwill and other acquired intangible assets, net (Note 6) |  | 55,707 | 64,212
Prepaid reinsurance premium |  | 413,728 | 386,509
Other assets (Note 8) |  | 415,272 | 407,849
Total assets |  | 6,269,484 | 5,900,881
Liabilities and Stockholders’ Equity |  |  |
Unearned premiums |  | 747,921 | 723,938
Reserve for losses and loss adjustment expense (“LAE”) (Note 10) |  | 412,460 | 507,588
Senior notes (Note 11) |  | 1,029,511 | 1,027,074
Reinsurance funds withheld |  | 352,952 | 288,398
Other liabilities (Note 12) |  | 379,362 | 353,845
Total liabilities |  | 2,922,206 | 2,900,843
Commitments and contingencies (Note 13) |  |  |
Stockholders’ equity |  |  |
Common stock: par value $0.001 per share; 485,000,000 shares authorized at September 30, 2018 and December 31, 2017; 230,978,401 and 233,416,989 shares issued at September 30, 2018 and December 31, 2017, respectively; 213,333,428 and 215,814,188 shares outstanding at September 30, 2018 and December 31, 2017, respectively |  | 231 | 233
Treasury stock, at cost: 17,644,973 and 17,602,801 shares at September 30, 2018 and December 31, 2017, respectively |  | (894,635) | (893,888)
Additional paid-in capital |  | 2,720,626 | 2,754,275
Retained earnings |  | 1,580,296 | 1,116,333
Accumulated other comprehensive income (loss) (Note 15) |  | (59,240) | 23,085
Total stockholders’ equity |  | 3,347,278 | 3,000,038
Total liabilities and stockholders’ equity |  | 6,269,484 | 5,900,881
Deferred policy acquisition costs |  | 16,922 | 16,987
Accrued Investment Income Receivable |  | $ 34,430 | $ 31,389
[1] | Property and equipment at cost, less accumulated depreciation of $61.0 million and $57.6 million at September 30, 2018 and December 31, 2017, respectively. Depreciation expense was $2.1 million and $1.9 million for the three-month periods ended September 30, 2018 and 2017, respectively, and $5.9 million and $4.9 million for the nine-month periods ended September 30, 2018 and 2017, respectively.

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