Loans and Allowance for Loan Losses - Purchased Credit Impaired (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	$ 16,058	$ 21,375
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	478	874
Construction
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	4,319	6,859
Residential Real Estate | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	2,107	2,828
Residential Real Estate | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	28	36
Commercial Real Estate | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	3,782	5,095
Commercial Real Estate | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	5,340	5,679
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Acquired with deteriorated credit quality	$ 4	$ 4