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Loans and Allowance for Loan Losses - Loan Portfolio by Categories (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | $ 13,000,000 | $ 11,720,000
Loans acquired, net of discount and allowance | 3,359,587 | 3,292,783
Total loans | 13,002,952 | 11,723,171
Loans, Excluding Acquired Loans |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 9,643,365 | 8,430,388
Consumer |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 403,726 | 405,470
Consumer | Credit cards |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 195,083 | 204,173
Consumer | Other consumer |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 208,643 | 201,297
Real Estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 6,792,021 | 5,966,453
Real Estate | Construction |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 1,712,858 | 1,300,723
Real Estate | Single family residential |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 1,448,455 | 1,440,443
Real Estate | Other commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 3,630,708 | 3,225,287
Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,108,572 | 1,939,423
Commercial | Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 1,894,819 | 1,774,909
Commercial | Agricultural |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 213,753 | 164,514
Other |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | $ 339,046 | $ 119,042

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- Definition Loans and leases receivable, net of deferred income covered and not covered + References No definition available. + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522 + Details
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