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Business Combinations (Loans Acquired) (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Sep. 01, 2016 | Mar. 11, 2016 | Feb. 13, 2015
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Contractually required payments |  | $ 296,529 |  |
Non-PCI Loans |  | 241,392 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | $ 80,690 |  | $ 80,690 | $ 154,496
Commercial |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | 134,468 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 58,934 |  |  |
Commercial | Construction and land development |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | 3,066 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 684 |  |  |
Commercial | Mortgage |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | 77,455 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 50,372 |  |  |
Commercial | Other commercial real estate |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | 22,174 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 2,629 |  |  |
Commercial | Commercial and industrial |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | 31,773 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 3,630 |  |  |
Noncommercial |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | 106,924 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 21,756 |  |  |
Noncommercial | Construction and land development |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 340 |  |  |
Noncommercial | Mortgage |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | 16,839 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | 18,934 |  |  |
Noncommercial | Consumer |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Non-PCI Loans |  | $ 80,218 |  |
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value | $ 1,244 |  |  |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27045933&loc=d3e13503-111538 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 + Details
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