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Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017
--- | --- | --- | ---
Assets [Abstract] |  |  |
Cash and due from banks | $ 815,458 | $ 602,510 | $ 547,203
Interest-bearing cash and cash equivalents | 430,789 | 1,714,544 | 1,926,779
Trading securities | 1,613,400 | 462,676 | 614,117
Investment securities | 374,039 | 461,793 | 466,562
Available for sale securities | 8,072,014 | 8,321,578 | 8,383,199
Fair value option securities | 452,150 | 755,054 | 819,531
Restricted equity securities | 311,189 | 320,189 | 347,542
Residential mortgage loans held for sale | 175,866 | 221,378 | 275,643
Loans | 18,349,459 | 17,153,424 | 17,206,834
Allowance for loan losses | (210,569) | (230,682) | (247,703)
Loans, net of allowance | 18,138,890 | 16,922,742 | 16,959,131
Premises and equipment, net | 327,129 | 317,335 | 320,060
Receivables | 277,738 | 178,800 | 173,990
Goodwill | 447,430 | 447,430 | 446,697
Intangible assets, net | 33,370 | 28,658 | 39,013
Mortgage servicing rights | 284,673 | 252,867 | 245,858
Real estate and other repossessed assets, net of allowance | 24,515 | 28,437 | 32,535
Derivative contracts, net | 349,481 | 220,502 | 352,559
Cash surrender value of bank-owned life insurance | 323,628 | 316,498 | 314,201
Receivable on unsettled securities sales | 421,313 | 340,077 | 370,486
Other assets | 416,792 | 359,092 | 370,409
Total assets | 33,289,864 | 32,272,160 | 33,005,515
Deposits [Abstract] |  |  |
Noninterest-bearing demand deposits | 9,063,623 | 9,243,338 | 9,185,481
Interest-bearing deposits: [Abstract] |  |  |
Transaction | 9,990,219 | 10,250,393 | 10,025,084
Savings | 502,601 | 469,158 | 465,225
Time | 2,075,846 | 2,098,416 | 2,172,289
Total deposits | 21,632,289 | 22,061,305 | 21,848,079
Funds purchased and repurchase agreements | 790,741 | 574,964 | 390,545
Other borrowings | 6,025,483 | 5,134,897 | 6,241,275
Subordinated debentures | 144,707 | 144,677 | 144,668
Accrued interest, taxes and expense | 231,592 | 164,895 | 152,029
Derivative contracts, net | 252,387 | 171,963 | 336,327
Due on unsettled securities purchases | 414,283 | 338,745 | 176,498
Other liabilities | 172,622 | 162,380 | 201,655
Total liabilities | 29,664,104 | 28,753,826 | 29,491,076
Shareholders' equity: [Abstract] |  |  |
Common stock | 4 | 4 | 4
Capital surplus | 1,044,430 | 1,035,895 | 1,028,489
Retained earnings | 3,297,083 | 3,048,487 | 2,999,005
Treasury stock | (564,123) | (552,845) | (545,441)
Accumulated other comprehensive gain (loss) | (162,362) | (36,174) | 6,757
Total shareholders’ equity | 3,615,032 | 3,495,367 | 3,488,814
Non-controlling interests | 10,728 | 22,967 | 25,625
Total equity | 3,625,760 | 3,518,334 | 3,514,439
Total liabilities and equity | $ 33,289,864 | $ 32,272,160 | $ 33,005,515

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- Definition Fair value option securities represent securities the Company has elected to carry at fair value and separately identified on the balance sheet with changes in fair value recognized in earnings as they occur. Certain residential mortgage-backed securities issued by US government agencies are held as an economic hedge of changes in the fair value of mortgage servicing rights and related derivative contracts. In addition, other securities may be held to manage interest rate risk or for deferred compensation purposes. Securities held for interest rate risk management may be economically hedged by derivative contracts not designated as hedging instruments effectively modify these fixed rate securities into variable rate securities. + References No definition available. + Details
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