Borrowings - Summary of Borrowings By Type (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Borrowings [Line Items]
Balance at End of Period	$ 32,091	$ 196,171
Balance at End of Period	206,168	127,522
Federal Home Loan Bank Advances [Member]
Schedule of Borrowings [Line Items]
Balance at End of Period	$ 175,256	$ 96,248
Weighted Average Interest Rate	1.50%	0.94%
Securities Sold under Agreements to Repurchase [Member]
Schedule of Borrowings [Line Items]
Balance at End of Period	$ 30,912	$ 31,274
Weighted Average Interest Rate	1.39%	0.91%
Subordinated Debt [Member]
Schedule of Borrowings [Line Items]
Balance at End of Period	$ 94,270	$ 94,087
Weighted Average Interest Rate	5.35%	5.36%
Federal Home Loan Bank Advances [Member]
Schedule of Borrowings [Line Items]
Balance at End of Period	$ 11,000	$ 91,300
Weighted Average Interest Rate	1.27%	0.74%
Federal Funds Purchased [Member]
Schedule of Borrowings [Line Items]
Balance at End of Period	$ 0	$ 80,000
Weighted Average Interest Rate	0.00%	0.81%
Securities Sold under Agreements to Repurchase [Member]
Schedule of Borrowings [Line Items]
Balance at End of Period	$ 21,091	$ 24,871
Weighted Average Interest Rate	0.05%	0.05%