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Acquisitions and Divestitures (Purchase Price Allocation) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | $ 602,952 |  | $ 602,952 |  |  | $ 639,073 |  |  |  |
Trading securities |  |  | 1,649,470 |  | 1,649,470 |  |  | 1,416,345 |  |  |  |
Loans held-for-sale | [1] |  | 692,659 |  | 692,659 |  |  | 699,377 |  |  |  |
Securities available-for-sale |  |  |  |  |  |  |  | 5,170,255 |  |  |  |
Securities held-to-maturity |  |  | 10,000 |  | 10,000 |  |  | 10,000 |  |  |  |
Loans |  |  | 27,701,740 | [2] | 27,701,740 | [2] |  | 27,658,929 | [2] | $ 19,989,319 |  |
Allowance for loan losses |  |  | (185,462) |  | (185,462) |  | $ (187,194) | (189,555) |  | (197,257) | $ (201,968) | $ (202,068)
CBF Goodwill |  |  | 1,409,276 |  | 1,409,276 |  |  | 1,386,853 |  | 236,335 |  | 191,371
Other intangible assets |  |  | 167,955 |  | 167,955 |  |  | 184,389 |  |  |  |
Premises and equipment |  |  | 525,175 |  | 525,175 |  |  | 532,251 |  |  |  |
OREO | [3] |  | 29,712 |  | 29,712 |  |  | 43,382 |  |  |  |
Other assets |  |  | 1,934,001 |  | 1,934,001 |  |  | 1,723,189 |  |  |  |
Total assets |  |  | 41,076,795 |  | 41,076,795 |  |  | 41,423,388 |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  |  | 30,977,867 |  | 30,977,867 |  |  | 30,620,362 |  |  |  |
Securities sold under agreements to repurchase |  |  | 713,152 |  | 713,152 |  |  | 656,602 |  |  |  |
Other short-term borrowings |  |  | 1,836,852 |  | 1,836,852 |  |  | 2,626,213 |  |  |  |
Term borrowings |  |  | 1,227,281 |  | 1,227,281 |  |  | 1,218,097 |  |  |  |
Other liabilities |  |  | 526,430 |  | 526,430 |  |  | 549,234 |  |  |  |
Total liabilities |  |  | 36,527,046 |  | 36,527,046 |  |  | 36,842,900 |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 1,409,276 |  | 1,409,276 |  |  | 1,386,853 |  | $ 236,335 |  | $ 191,371
Capital Bank Financial Corp |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
CBF Goodwill |  |  | 1,169,324 |  | 1,169,324 |  |  |  |  |  |  |
Assets As Recorded: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 205,999 |  | 205,999 |  |  |  |  |  |  |
Trading securities |  |  | 0 |  | 0 |  |  |  |  |  |  |
Loans held-for-sale |  |  | 124,918 |  | 124,918 |  |  |  |  |  |  |
Securities available-for-sale |  | $ 1,200,000 | 1,193,393 |  | 1,193,393 |  |  |  |  |  |  |
Securities held-to-maturity |  |  | 0 |  | 0 |  |  |  |  |  |  |
Loans |  | 7,300,000 | 7,276,544 |  | 7,276,544 |  |  |  |  |  |  |
Allowance for loan losses |  |  | 0 |  | 0 |  |  |  |  |  |  |
Other intangible assets |  |  | 141,207 |  | 141,207 |  |  |  |  |  |  |
Premises and equipment |  |  | 231,447 |  | 231,447 |  |  |  |  |  |  |
OREO |  |  | 33,613 |  | 33,613 |  |  |  |  |  |  |
Other assets |  |  | 651,024 |  | 651,024 |  |  |  |  |  |  |
Total assets acquired |  | 9,900,000 | 9,858,145 |  | 9,858,145 |  |  |  |  |  |  |
Liabilities As Recorded: |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | 8,100,000 | 8,140,102 |  | 8,140,102 |  |  |  |  |  |  |
Securities sold under agreements to repurchase |  |  | 26,664 |  | 26,664 |  |  |  |  |  |  |
Other short-term borrowings |  |  | 390,391 |  | 390,391 |  |  |  |  |  |  |
Term borrowings |  |  | 187,169 |  | 187,169 |  |  |  |  |  |  |
Other liabilities |  |  | 66,810 |  | 66,810 |  |  |  |  |  |  |
Total liabilities assumed |  |  | 8,811,136 |  | 8,811,136 |  |  |  |  |  |  |
Net assets acquired |  |  | 1,047,009 |  | 1,047,009 |  |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |  |  |
Equity |  |  |  |  | (1,746,724) |  |  |  |  |  |  |
Cash |  | (423,600) | (46,000) |  | (469,609) |  |  |  |  |  |  |
Total consideration paid |  | (2,200,000) |  |  | (2,216,333) |  |  |  |  |  |  |
Goodwill |  |  | 1,169,324 |  | 1,169,324 |  |  |  |  |  |  |
Capital Bank Financial Corp | Purchase Accounting/Fair Value Adjustments |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | 0 |  | 0 |  |  | 0 |  |  |  |
Trading securities |  |  | 0 |  | 0 |  |  | (4,758) |  |  |  |
Loans held-for-sale |  |  | (9,085) |  | (9,085) |  |  | 134,003 |  |  |  |
Securities available-for-sale |  |  | 0 |  | 0 |  |  | 175,526 |  |  |  |
Securities held-to-maturity |  |  | 0 |  | 0 |  |  | (177,549) |  |  |  |
Loans |  |  | 867 |  | 867 |  |  | (320,372) |  |  |  |
Allowance for loan losses |  |  | 0 |  | 0 |  |  | 45,711 |  |  |  |
CBF Goodwill |  |  | 0 |  | 0 |  |  | (231,292) |  |  |  |
Other intangible assets |  |  | (2,593) |  | (2,593) |  |  | 119,302 |  |  |  |
Premises and equipment |  |  | (1,905) |  | (1,905) |  |  | 37,054 |  |  |  |
OREO |  |  | (315) |  | (315) |  |  | (9,149) |  |  |  |
Other assets |  |  | (7,528) |  | (7,528) |  |  | 41,320 |  |  |  |
Total assets |  |  | (20,559) |  | (20,559) |  |  | (190,204) |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  |  | (642) |  | (642) |  |  | (849) |  |  |  |
Securities sold under agreements to repurchase |  |  | 0 |  | 0 |  |  | 0 |  |  |  |
Other short-term borrowings |  |  | 0 |  | 0 |  |  | 0 |  |  |  |
Term borrowings |  |  | 0 |  | 0 |  |  | 67,683 |  |  |  |
Other liabilities |  |  | 2,524 |  | 2,524 |  |  | 4,291 |  |  |  |
Total liabilities |  |  | 1,882 |  | 1,882 |  |  | 71,125 |  |  |  |
Net assets acquired |  |  | (22,441) |  | (22,441) |  |  | (261,329) |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | $ 0 |  | $ 0 |  |  | $ (231,292) |  |  |  |
Capital Bank Financial Corp |  |  |  |  |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | 205,999 |  |  |  |  |  |  |  |  |  |
Trading securities |  | 4,758 |  |  |  |  |  |  |  |  |  |
Loans held-for-sale |  | 0 |  |  |  |  |  |  |  |  |  |
Securities available-for-sale |  | 1,017,867 |  |  |  |  |  |  |  |  |  |
Securities held-to-maturity |  | 177,549 |  |  |  |  |  |  |  |  |  |
Loans |  | 7,596,049 |  |  |  |  |  |  |  |  |  |
Allowance for loan losses |  | (45,711) |  |  |  |  |  |  |  |  |  |
CBF Goodwill |  | 231,292 |  |  |  |  |  |  |  |  |  |
Other intangible assets |  | 24,498 |  |  |  |  |  |  |  |  |  |
Premises and equipment |  | 196,298 |  |  |  |  |  |  |  |  |  |
OREO |  | 43,077 |  |  |  |  |  |  |  |  |  |
Other assets |  | 617,232 |  |  |  |  |  |  |  |  |  |
Total assets |  | 10,068,908 |  |  |  |  |  |  |  |  |  |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | 8,141,593 |  |  |  |  |  |  |  |  |  |
Securities sold under agreements to repurchase |  | 26,664 |  |  |  |  |  |  |  |  |  |
Other short-term borrowings |  | 390,391 |  |  |  |  |  |  |  |  |  |
Term borrowings |  | 119,486 |  |  |  |  |  |  |  |  |  |
Other liabilities |  | 59,995 |  |  |  |  |  |  |  |  |  |
Total liabilities |  | 8,738,129 |  |  |  |  |  |  |  |  |  |
Net assets acquired |  | 1,330,779 |  |  |  |  |  |  |  |  |  |
Consideration paid: |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 231,292 |  |  |  |  |  |  |  |  |  |
[1] | June 30, 2018 and December 31, 2017 include $8.9 million and $11.7 million, respectively, of held-for-sale consumer mortgage loans secured by residential real estate in process of foreclosure.
[2] | June 30, 2018 and December 31, 2017 include $21.4 million and $22.7 million, respectively, of held-to-maturity consumer mortgage loans secured by residential real estate in process of foreclosure.
[3] | June 30, 2018 and December 31, 2017 include $6.1 million and $6.3 million, respectively, of foreclosed residential real estate.

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