Loans and Leases (Recorded Fair Values of Purchased Non-Impaired Loans and Leases) (Details) $ in Thousands	Sep. 01, 2016 USD ($)
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Total non-PCI loans and leases	$ 241,392
Commercial
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Total non-PCI loans and leases	134,468
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	3,066
Commercial | Mortgage
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Total non-PCI loans and leases	77,455
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	22,174
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	31,773
Noncommercial
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Total non-PCI loans and leases	106,924
Noncommercial | Mortgage
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Total non-PCI loans and leases	16,839
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	9,867
Noncommercial | Consumer
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Total non-PCI loans and leases	$ 80,218