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Loans and Leases (Recorded Fair Values of Purchased Non-Impaired Loans and Leases) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) loans | Dec. 31, 2017 USD ($) loans | May 05, 2017 USD ($)
Non-PCI Loans |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 491 | 632 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 43,553 | $ 49,000 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 164 | 204 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 13,318 | $ 11,990 |
Principal Forgiveness [Member] | Non-PCI Loans |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 3 | 6 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 1,003 | $ 1,206 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 0 | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 0 | $ 634 |
Principal Forgiveness [Member] | Non-PCI Loans | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 3 | 5 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 1,003 | $ 1,124 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 0 | 1 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 0 | $ 634 |
Principal Forgiveness [Member] | Non-PCI Loans | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 0 | 1 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 82 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 0 | 0 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 0 | $ 0 |
Extended Maturity [Member] | Non-PCI Loans |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 42 | 47 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 5,486 | $ 6,517 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 8 | 2 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 865 | $ 273 |
Extended Maturity [Member] | Non-PCI Loans | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 21 | 13 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 3,933 | $ 3,007 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 4 | 0 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 675 | $ 0 |
Extended Maturity [Member] | Non-PCI Loans | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 21 | 34 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 1,554 | $ 3,510 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 4 | 2 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 190 | $ 273 |
Interest Rate Below Market Reduction [Member] | Non-PCI Loans |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 269 | 363 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 28,404 | $ 30,412 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 92 | 110 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 8,459 | $ 7,983 |
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 85 | 92 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 12,859 | $ 14,811 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 24 | 32 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 2,998 | $ 3,392 |
Interest Rate Below Market Reduction [Member] | Non-PCI Loans | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 184 | 271 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 15,545 | $ 15,601 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 68 | 78 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 5,461 | $ 4,591 |
Discharge of Debt [Member] | Non-PCI Loans |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 177 | 216 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 8,660 | $ 10,865 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 64 | 91 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 3,994 | $ 3,100 |
Discharge of Debt [Member] | Non-PCI Loans | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 26 | 39 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 2,043 | $ 3,012 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 8 | 26 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 825 | $ 708 |
Discharge of Debt [Member] | Non-PCI Loans | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | loans | 151 | 177 |
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 6,617 | $ 7,853 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | loans | 56 | 65 |
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 3,169 | $ 2,392 |
Palmetto Heritage Bancshares |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition | 142,413 |  |
CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesAcquiredDuringPeriodCashFlowsNotExpectedtobeCollectedatAcquisition | 0 |  |
Total non-PCI loans and leases | 131,283 |  | $ 131,300
Palmetto Heritage Bancshares | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 52,356
Palmetto Heritage Bancshares | Commercial | Construction and land development |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 13,186
Palmetto Heritage Bancshares | Commercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 29,225
Palmetto Heritage Bancshares | Commercial | Other commercial real estate |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 753
Palmetto Heritage Bancshares | Commercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 8,153
Palmetto Heritage Bancshares | Commercial | Other |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 1,039
Palmetto Heritage Bancshares | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 78,927
Palmetto Heritage Bancshares | Noncommercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 59,076
Palmetto Heritage Bancshares | Noncommercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 11,103
Palmetto Heritage Bancshares | Noncommercial | Revolving mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 6,175
Palmetto Heritage Bancshares | Noncommercial | Consumer |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 2,573
Capital Commerce Bancorp |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition | 198,568 |  |
CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesAcquiredDuringPeriodCashFlowsNotExpectedtobeCollectedatAcquisition | 5,427 |  |
Total non-PCI loans and leases | 173,354 |  | 173,400
Capital Commerce Bancorp | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 108,019
Capital Commerce Bancorp | Commercial | Construction and land development |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 10,299
Capital Commerce Bancorp | Commercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 57,049
Capital Commerce Bancorp | Commercial | Other commercial real estate |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 6,370
Capital Commerce Bancorp | Commercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 34,301
Capital Commerce Bancorp | Commercial | Other |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 0
Capital Commerce Bancorp | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 65,335
Capital Commerce Bancorp | Noncommercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 50,630
Capital Commerce Bancorp | Noncommercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 11,173
Capital Commerce Bancorp | Noncommercial | Revolving mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 2,552
Capital Commerce Bancorp | Noncommercial | Consumer |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 980
HomeBancorp Inc. |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition | 710,876 |  |
CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesAcquiredDuringPeriodCashFlowsNotExpectedtobeCollectedatAcquisition | 9,845 |  |
Total non-PCI loans and leases | 550,618 |  | 550,600
HomeBancorp Inc. | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 252,327
HomeBancorp Inc. | Commercial | Construction and land development |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 525
HomeBancorp Inc. | Commercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 188,688
HomeBancorp Inc. | Commercial | Other commercial real estate |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 55,183
HomeBancorp Inc. | Commercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 7,931
HomeBancorp Inc. | Commercial | Other |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 0
HomeBancorp Inc. | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 298,291
HomeBancorp Inc. | Noncommercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 296,273
HomeBancorp Inc. | Noncommercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 0
HomeBancorp Inc. | Noncommercial | Revolving mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 51
HomeBancorp Inc. | Noncommercial | Consumer |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 1,967
Guaranty Bank |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition | 703,916 |  |
CertainLoansAcquiredinTransferNotAccountedforasDebtSecuritiesAcquiredDuringPeriodCashFlowsNotExpectedtobeCollectedatAcquisition | 16,073 |  |
Total non-PCI loans and leases | $ 574,553 |  | 574,600
Guaranty Bank | Commercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 185,249
Guaranty Bank | Commercial | Construction and land development |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 0
Guaranty Bank | Commercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 850
Guaranty Bank | Commercial | Other commercial real estate |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 0
Guaranty Bank | Commercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 583
Guaranty Bank | Commercial | Other |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 183,816
Guaranty Bank | Noncommercial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 389,304
Guaranty Bank | Noncommercial | Mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 309,612
Guaranty Bank | Noncommercial | Commercial and industrial |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 0
Guaranty Bank | Noncommercial | Revolving mortgage |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | 54,780
Guaranty Bank | Noncommercial | Consumer |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items] |  |  |
Total non-PCI loans and leases |  |  | $ 24,912

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