Accounting for Certain Loans Acquired in a Purchase - Contractually Required Payments (Details) - USD ($) $ in Thousands	Apr. 17, 2015	Nov. 07, 2014
C Financial
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date	$ 2,632
Nonaccretable difference	393
Expected cash flows at acquisition date	2,239
Accretable difference	145
Basis in loans at acquisition date	$ 2,094
Community
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required payments receivable at acquisition date		$ 26,032
Nonaccretable difference		3,498
Expected cash flows at acquisition date		22,534
Accretable difference		2,234
Basis in loans at acquisition date		$ 20,300