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Loans and Leases (Changes In Carrying Value Of Acquired Impaired Loans) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Nov. 01, 2018 | Oct. 02, 2018 | May 01, 2018 | May 05, 2017 | Jan. 13, 2017 | Dec. 31, 2015
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
Reductions for repayments, foreclosures and changes in carrying value, net of accretion | $ (248,114) | $ (322,447) | $ (298,602) |  |  |  |  |  |
Outstanding principal balance | 960,457 | 1,175,441 | 1,266,395 |  |  |  |  |  |
PCI Loans | 606,576 | 762,998 | 809,169 |  |  |  |  |  | $ 950,516
PCI loans | 30,190 | 199,682 | 80,690 |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield, Accretion | 61,502 | 76,594 | $ 76,565 |  |  |  |  |  |
Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI Loans | 296,672 | 393,419 |  |  |  |  |  |  |
PCI Loans |  |  |  |  |  |  |  |  |
Loans and Leases Receivable Disclosure [Abstract] |  |  |  |  |  |  |  |  |
Nonaccruing | $ 1,300 | $ 624 |  |  |  |  |  |  |
Palmetto Heritage Bancshares |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition |  |  |  |  |  |  | $ 4,783 |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition |  |  |  |  |  |  | 4,112 |  |
PCI loans |  |  |  | $ 3,863 |  |  | 3,863 |  |
Palmetto Heritage Bancshares | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 1,637 |  |  |  |  |
Palmetto Heritage Bancshares | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 2,226 |  |  |  |  |
Palmetto Heritage Bancshares | Construction and land development | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 212 |  |  |  |  |
Palmetto Heritage Bancshares | Construction and land development | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 0 |  |  |  |  |
Palmetto Heritage Bancshares | Mortgage | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 1,053 |  |  |  |  |
Palmetto Heritage Bancshares | Mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 2,226 |  |  |  |  |
Palmetto Heritage Bancshares | Revolving mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 0 |  |  |  |  |
Palmetto Heritage Bancshares | Other commercial real estate | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 0 |  |  |  |  |
Palmetto Heritage Bancshares | Commercial and industrial | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | 372 |  |  |  |  |
Palmetto Heritage Bancshares | Consumer | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  | $ 0 |  |  |  |  |
Capital Commerce Bancorp |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition |  |  |  |  |  |  | 13,871 |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition |  |  |  |  |  |  | 11,814 |  |
PCI loans |  |  |  |  | $ 10,772 |  | 10,772 |  |
Capital Commerce Bancorp | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 4,250 |  |  |  |
Capital Commerce Bancorp | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 6,522 |  |  |  |
Capital Commerce Bancorp | Construction and land development | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 1,482 |  |  |  |
Capital Commerce Bancorp | Construction and land development | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 0 |  |  |  |
Capital Commerce Bancorp | Mortgage | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 1,846 |  |  |  |
Capital Commerce Bancorp | Mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 6,503 |  |  |  |
Capital Commerce Bancorp | Revolving mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 0 |  |  |  |
Capital Commerce Bancorp | Other commercial real estate | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 0 |  |  |  |
Capital Commerce Bancorp | Commercial and industrial | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | 922 |  |  |  |
Capital Commerce Bancorp | Consumer | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  | $ 19 |  |  |  |
HomeBancorp Inc. |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition |  |  |  |  |  |  | 26,651 |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition |  |  |  |  |  |  | 19,697 |  |
PCI loans |  |  |  |  |  | $ 15,555 | 15,555 |  |
HomeBancorp Inc. | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 8,238 |  |  |
HomeBancorp Inc. | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 7,317 |  |  |
HomeBancorp Inc. | Construction and land development | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 0 |  |  |
HomeBancorp Inc. | Construction and land development | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 0 |  |  |
HomeBancorp Inc. | Mortgage | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 7,815 |  |  |
HomeBancorp Inc. | Mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 7,317 |  |  |
HomeBancorp Inc. | Revolving mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 0 |  |  |
HomeBancorp Inc. | Other commercial real estate | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 0 |  |  |
HomeBancorp Inc. | Commercial and industrial | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | 423 |  |  |
HomeBancorp Inc. | Consumer | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  | $ 0 |  |  |
Guaranty Bank |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition |  |  |  |  |  |  | 158,456 |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition |  |  |  |  |  |  | 142,000 |  |
PCI loans |  |  |  |  |  |  | 114,533 |  |
Guaranty Bank | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 701 |  |
Guaranty Bank | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 113,832 |  |
Guaranty Bank | Construction and land development | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 55 |  |
Guaranty Bank | Construction and land development | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 26 |  |
Guaranty Bank | Mortgage | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 644 |  |
Guaranty Bank | Mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 80,475 |  |
Guaranty Bank | Revolving mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 33,319 |  |
Guaranty Bank | Other commercial real estate | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 0 |  |
Guaranty Bank | Commercial and industrial | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | 2 |  |
Guaranty Bank | Consumer | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  | $ 12 |  |
Harvest Community Bank |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition |  |  |  |  |  |  |  | $ 111,250 |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition |  |  |  |  |  |  |  | 101,802 |
PCI loans |  |  |  |  |  |  |  | 85,149 |
Harvest Community Bank | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 54,976 |
Harvest Community Bank | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 30,173 |
Harvest Community Bank | Construction and land development | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 7,061 |
Harvest Community Bank | Construction and land development | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 0 |
Harvest Community Bank | Mortgage | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 21,836 |
Harvest Community Bank | Mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 25,857 |
Harvest Community Bank | Revolving mortgage | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 3,434 |
Harvest Community Bank | Other commercial real estate | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 6,404 |
Harvest Community Bank | Commercial and industrial | Commercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | 19,675 |
Harvest Community Bank | Consumer | Noncommercial |  |  |  |  |  |  |  |  |
Carrying Value of Acquired Impaired Loans [Roll Forward] |  |  |  |  |  |  |  |  |
PCI loans |  |  |  |  |  |  |  | $ 882 |

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- Definition Current period recognition due to accretion of the excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan for loans accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 + Details
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- Definition Fair value at acquisition of acquired loans accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 + Details
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- Definition Amount of cash flows expected to be collected at acquisition of acquired loans accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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- Definition Amount of contractually required payments receivable at acquisition of acquired loans accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and other-than-temporary impairments), for loans accounted for as debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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