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Acquisitions and Divestitures (Purchase Price Allocation) (Details) - USD ($) $ in Thousands | Nov. 30, 2017 | Apr. 03, 2017 | Oct. 02, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | --- | --- | --- | ---
Assets: |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  |  |  |  | $ 639,073 |  | $ 373,274 |  |  |
Interest-bearing cash |  |  |  |  | 1,185,600 |  | 1,060,034 |  |  |
Trading Securities |  |  |  |  | 1,416,345 |  | 897,071 |  |  |
Loans held-for-sale | [1] |  |  |  | 699,377 |  | 111,248 |  |  |
Securities available-for-sale (Note 3) |  |  |  |  | 5,170,255 |  | 3,943,499 |  |  |
Securities held-to-maturity (Note 3) |  |  |  |  | 10,000 |  | 14,347 |  |  |
Loans, net of unearned income |  |  |  |  | 27,658,929 | [2] | 19,589,520 | [2] | $ 17,686,502 |
Allowance for loan losses |  |  |  |  | (189,555) |  | (202,068) |  | (210,242) | $ (232,448)
Goodwill (Note 7) |  |  |  |  | 1,386,853 |  | 191,371 |  | 191,307 | 145,932
Other intangible assets, net |  |  |  |  | 184,389 |  | 21,017 |  |  |
Premises and equipment, net |  |  |  |  | 532,251 |  | 289,385 |  |  |
Other real estate owned (OREO) | [3] |  |  |  | 43,382 |  | 16,237 |  |  |
Other assets |  |  |  |  | 1,723,189 |  | 1,406,711 |  |  |
Total assets |  |  |  |  | 41,423,388 |  | 28,555,231 |  |  |
Liabilities As Acquired: |  |  |  |  |  |  |  |  |  |
Deposits |  |  |  |  | 30,620,362 |  | 22,672,363 |  |  |
Securities sold under agreements to repurchase (Note 9 and Note 23) |  |  |  |  | 656,602 |  | 453,053 |  |  |
Other short-term borrowings |  |  |  |  | 2,626,213 |  | 83,177 |  |  |
Fixed income payables |  |  |  |  | 48,996 |  | 21,002 |  |  |
Term borrowings (Note 10) |  |  |  |  | 1,218,097 |  | 1,040,656 |  |  |
Other liabilities |  |  |  |  | 549,234 |  | 467,944 |  |  |
Total liabilities |  |  |  |  | 36,842,900 |  | 25,850,147 |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 1,386,853 |  | $ 191,371 |  | $ 191,307 | $ 145,932
Capital Bank Financial Corporation |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Loans held-for-sale |  | $ 132,800 |  |  |  |  |  |  |  |
Goodwill (Note 7) |  | 1,146,901 |  |  |  |  |  |  |  |
Assets As Recorded: |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | 205,999 |  |  |  |  |  |  |  |
Trading securities |  | 0 |  |  |  |  |  |  |  |
Loans held-for-sale |  | 134,003 |  |  |  |  |  |  |  |
Securities available-for-sale |  | 1,193,393 |  |  |  |  |  |  |  |
Securities held-to-maturity |  | 0 |  |  |  |  |  |  |  |
Loans |  | 7,275,677 |  |  |  |  |  |  |  |
Allowance for loan losses |  | 0 |  |  |  |  |  |  |  |
Other intangible assets |  | 143,800 |  |  |  |  |  |  |  |
Premises and equipment |  | 233,352 |  |  |  |  |  |  |  |
OREO |  | 33,928 |  |  |  |  |  |  |  |
Deferred tax asset |  | 137,700 |  |  |  |  |  |  |  |
Other assets |  | 658,552 |  |  |  |  |  |  |  |
Total assets acquired |  | 9,878,704 |  |  |  |  |  |  |  |
Liabilities As Recorded: |  |  |  |  |  |  |  |  |  |
Deposits |  | 8,140,744 |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase |  | 26,664 |  |  |  |  |  |  |  |
Other short-term borrowings |  | 390,391 |  |  |  |  |  |  |  |
Term borrowings |  | 187,169 |  |  |  |  |  |  |  |
Other liabilities |  | 64,286 |  |  |  |  |  |  |  |
Total liabilities assumed |  | 8,809,254 |  |  |  |  |  |  |  |
Net assets acquired |  | 1,069,450 |  |  |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Equity |  | (1,792,759) |  |  |  |  |  |  |  |
Cash |  | (423,592) |  |  |  |  |  |  |  |
Total consideration paid |  | (2,216,351) |  |  |  |  |  |  |  |
Goodwill |  | 1,146,901 |  |  |  |  |  |  |  |
Capital Bank Financial Corporation | Fair Value Adjustments |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | 0 |  |  |  |  |  |  |  |
Trading Securities |  | (4,758) |  |  |  |  |  |  |  |
Loans held-for-sale |  | 134,003 |  |  |  |  |  |  |  |
Securities available-for-sale (Note 3) |  | 175,526 |  |  |  |  |  |  |  |
Securities held-to-maturity (Note 3) |  | (177,549) |  |  |  |  |  |  |  |
Loans, net of unearned income |  | (320,372) |  |  |  |  |  |  |  |
Allowance for loan losses |  | 45,711 |  |  |  |  |  |  |  |
Goodwill (Note 7) |  | (231,292) |  |  |  |  |  |  |  |
Other intangible assets, net |  | 119,302 |  |  |  |  |  |  |  |
Premises and equipment, net |  | 37,054 |  |  |  |  |  |  |  |
Other real estate owned (OREO) |  | (9,149) |  |  |  |  |  |  |  |
Other assets |  | 41,320 |  |  |  |  |  |  |  |
Total assets |  | (190,204) |  |  |  |  |  |  |  |
Liabilities As Acquired: |  |  |  |  |  |  |  |  |  |
Deposits |  | (849) |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase (Note 9 and Note 23) |  | 0 |  |  |  |  |  |  |  |
Other short-term borrowings |  | 0 |  |  |  |  |  |  |  |
Term borrowings (Note 10) |  | 67,683 |  |  |  |  |  |  |  |
Other liabilities |  | 4,291 |  |  |  |  |  |  |  |
Total liabilities |  | 71,125 |  |  |  |  |  |  |  |
Net Assets |  | (261,329) |  |  |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Goodwill |  | (231,292) |  |  |  |  |  |  |  |
Coastal Securities, Inc |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Goodwill (Note 7) |  |  | $ 44,964 |  |  |  |  |  |  |
Assets As Recorded: |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 7,502 |  |  |  |  |  |  |
Interest-bearing cash |  |  | 4,132 |  |  |  |  |  |  |
Trading securities |  |  | 139,082 |  |  |  |  |  |  |
Loans held-for-sale |  |  | 236,088 |  |  |  |  |  |  |
Investment securities |  |  | 1,413 |  |  |  |  |  |  |
Other intangible assets |  |  | 27,300 |  |  |  |  |  |  |
Premises and equipment |  |  | 1,229 |  |  |  |  |  |  |
Other assets |  |  | 1,672 |  |  |  |  |  |  |
Total assets acquired |  |  | 418,418 |  |  |  |  |  |  |
Liabilities As Recorded: |  |  |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase |  |  | 201,595 |  |  |  |  |  |  |
Other short-term borrowings |  |  | 33,509 |  |  |  |  |  |  |
Fixed income payables |  |  | 96,489 |  |  |  |  |  |  |
Other liabilities |  |  | 316 |  |  |  |  |  |  |
Total liabilities assumed |  |  | 331,909 |  |  |  |  |  |  |
Net assets acquired |  |  | 86,509 |  |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Cash |  |  | (131,473) |  |  |  |  |  |  |
Goodwill |  |  | 44,964 |  |  |  |  |  |  |
Coastal Securities, Inc | Fair Value Adjustments |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  |  | 0 |  |  |  |  |  |  |
Interest-bearing cash |  |  | 0 |  |  |  |  |  |  |
Trading Securities |  |  | (284,580) |  |  |  |  |  |  |
Loans held-for-sale |  |  | 236,088 |  |  |  |  |  |  |
Investment securities |  |  | 1,413 |  |  |  |  |  |  |
Other intangible assets, net |  |  | 27,300 |  |  |  |  |  |  |
Premises and equipment, net |  |  | 0 |  |  |  |  |  |  |
Other assets |  |  | 14 |  |  |  |  |  |  |
Total assets |  |  | (19,765) |  |  |  |  |  |  |
Liabilities As Acquired: |  |  |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase (Note 9 and Note 23) |  |  | 0 |  |  |  |  |  |  |
Other short-term borrowings |  |  | 0 |  |  |  |  |  |  |
Fixed income payables |  |  | (47,158) |  |  |  |  |  |  |
Other liabilities |  |  | (642) |  |  |  |  |  |  |
Total liabilities |  |  | (47,800) |  |  |  |  |  |  |
Net Assets |  |  | 28,035 |  |  |  |  |  |  |
Trust Atlantic Financial Corporation |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Goodwill (Note 7) |  |  |  | $ 45,375 |  |  |  |  |  |
Assets As Recorded: |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 18,801 |  |  |  |  |  |
Securities available-for-sale |  |  |  | 73,812 |  |  |  |  |  |
Loans |  |  |  | 281,944 |  |  |  |  |  |
Allowance for loan losses |  |  |  | 0 |  |  |  |  |  |
Other intangible assets |  |  |  | 1,950 |  |  |  |  |  |
Premises and equipment |  |  |  | 3,567 |  |  |  |  |  |
OREO |  |  |  | 923 |  |  |  |  |  |
Deferred tax asset |  |  |  | 7,202 |  |  |  |  |  |
Other assets |  |  |  | 11,773 |  |  |  |  |  |
Total assets acquired |  |  |  | 399,972 |  |  |  |  |  |
Liabilities As Recorded: |  |  |  |  |  |  |  |  |  |
Deposits |  |  |  | 344,088 |  |  |  |  |  |
Other liabilities |  |  |  | 4,580 |  |  |  |  |  |
Total liabilities assumed |  |  |  | 348,668 |  |  |  |  |  |
Net assets acquired |  |  |  | 51,304 |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Equity |  |  |  | (72,791) |  |  |  |  |  |
Cash |  |  |  | (23,888) |  |  |  |  |  |
Total consideration paid |  |  |  | (96,679) |  |  |  |  |  |
Goodwill |  |  |  | 45,375 |  |  |  |  |  |
Trust Atlantic Financial Corporation | Fair Value Adjustments |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  |  |  | 0 |  |  |  |  |  |
Securities available-for-sale (Note 3) |  |  |  | (10) |  |  |  |  |  |
Loans, net of unearned income |  |  |  | (16,106) |  |  |  |  |  |
Allowance for loan losses |  |  |  | 4,639 |  |  |  |  |  |
Goodwill (Note 7) |  |  |  | (3,721) |  |  |  |  |  |
Other intangible assets, net |  |  |  | 1,866 |  |  |  |  |  |
Premises and equipment, net |  |  |  | 1,214 |  |  |  |  |  |
Other real estate owned (OREO) |  |  |  | (95) |  |  |  |  |  |
Deferred tax asset |  |  |  | 4,262 |  |  |  |  |  |
Other assets |  |  |  | 1,135 |  |  |  |  |  |
Total assets |  |  |  | (6,816) |  |  |  |  |  |
Liabilities As Acquired: |  |  |  |  |  |  |  |  |  |
Deposits |  |  |  | 1,300 |  |  |  |  |  |
Other liabilities |  |  |  | 1,407 |  |  |  |  |  |
Total liabilities |  |  |  | 2,707 |  |  |  |  |  |
Net Assets |  |  |  | (9,523) |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | (3,721) |  |  |  |  |  |
Capital Bank Financial Corporation |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  | 205,999 |  |  |  |  |  |  |  |
Trading Securities |  | 4,758 |  |  |  |  |  |  |  |
Loans held-for-sale |  | 0 |  |  |  |  |  |  |  |
Securities available-for-sale (Note 3) |  | 1,017,867 |  |  |  |  |  |  |  |
Securities held-to-maturity (Note 3) |  | 177,549 |  |  |  |  |  |  |  |
Loans, net of unearned income |  | 7,596,049 |  |  |  |  |  |  |  |
Allowance for loan losses |  | (45,711) |  |  |  |  |  |  |  |
Goodwill (Note 7) |  | 231,292 |  |  |  |  |  |  |  |
Other intangible assets, net |  | 24,498 |  |  |  |  |  |  |  |
Premises and equipment, net |  | 196,298 |  |  |  |  |  |  |  |
Other real estate owned (OREO) |  | 43,077 |  |  |  |  |  |  |  |
Other assets |  | 617,232 |  |  |  |  |  |  |  |
Total assets |  | 10,068,908 |  |  |  |  |  |  |  |
Liabilities As Acquired: |  |  |  |  |  |  |  |  |  |
Deposits |  | 8,141,593 |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase (Note 9 and Note 23) |  | 26,664 |  |  |  |  |  |  |  |
Other short-term borrowings |  | 390,391 |  |  |  |  |  |  |  |
Term borrowings (Note 10) |  | 119,486 |  |  |  |  |  |  |  |
Other liabilities |  | 59,995 |  |  |  |  |  |  |  |
Total liabilities |  | 8,738,129 |  |  |  |  |  |  |  |
Net Assets |  | 1,330,779 |  |  |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 231,292 |  |  |  |  |  |  |  |
Coastal Securities, Inc |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  |  | 7,502 |  |  |  |  |  |  |
Interest-bearing cash |  |  | 4,132 |  |  |  |  |  |  |
Trading Securities |  |  | 423,662 |  |  |  |  |  |  |
Loans held-for-sale |  |  | 0 |  |  |  |  |  |  |
Investment securities |  |  | 0 |  |  |  |  |  |  |
Other intangible assets, net |  |  | 0 |  |  |  |  |  |  |
Premises and equipment, net |  |  | 1,229 |  |  |  |  |  |  |
Other assets |  |  | 1,658 |  |  |  |  |  |  |
Total assets |  |  | 438,183 |  |  |  |  |  |  |
Liabilities As Acquired: |  |  |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase (Note 9 and Note 23) |  |  | 201,595 |  |  |  |  |  |  |
Other short-term borrowings |  |  | 33,509 |  |  |  |  |  |  |
Fixed income payables |  |  | 143,647 |  |  |  |  |  |  |
Other liabilities |  |  | 958 |  |  |  |  |  |  |
Total liabilities |  |  | 379,709 |  |  |  |  |  |  |
Net Assets |  |  | $ 58,474 |  |  |  |  |  |  |
Trust Atlantic Financial Corporation |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |
Cash and due from banks |  |  |  | 18,801 |  |  |  |  |  |
Securities available-for-sale (Note 3) |  |  |  | 73,822 |  |  |  |  |  |
Loans, net of unearned income |  |  |  | 298,050 |  |  |  |  |  |
Allowance for loan losses |  |  |  | (4,639) |  |  |  |  |  |
Goodwill (Note 7) |  |  |  | 3,721 |  |  |  |  |  |
Other intangible assets, net |  |  |  | 84 |  |  |  |  |  |
Premises and equipment, net |  |  |  | 2,353 |  |  |  |  |  |
Other real estate owned (OREO) |  |  |  | 1,018 |  |  |  |  |  |
Deferred tax asset |  |  |  | 2,940 |  |  |  |  |  |
Other assets |  |  |  | 10,638 |  |  |  |  |  |
Total assets |  |  |  | 406,788 |  |  |  |  |  |
Liabilities As Acquired: |  |  |  |  |  |  |  |  |  |
Deposits |  |  |  | 342,788 |  |  |  |  |  |
Other liabilities |  |  |  | 3,173 |  |  |  |  |  |
Total liabilities |  |  |  | 345,961 |  |  |  |  |  |
Net Assets |  |  |  | 60,827 |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | $ 3,721 |  |  |  |  |  |
[1] | December 31, 2017 and 2016 include $11.7 million and $19.3 million, respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.
[2] | December 31, 2017 and 2016 include $22.7 million and $28.5 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.
[3] | December 31, 2017 and 2016 include $6.3 million and $8.1 million, respectively, of foreclosed residential real estate.

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