Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Assets [Abstract]
Interest bearing deposits - time		$ 3,489	$ 5,591
Trading securities		347	410
Securities available for sale		548,865	610,616
Federal Home Loan Bank and Federal Reserve Bank Stock		15,543	15,543
Liabilities [Abstract]
Federal funds purchased		3,000	0
Other borrowings		72,849	9,433
Subordinated debentures		35,569	35,569
Payment plan receivables and commercial loans held for sale			31,400
Reciprocal deposits included in deposits with no stated maturity		13,500	7,400
Reciprocal deposits included in deposits with stated maturity		35,500	31,300
Recorded Book Balance [Member]
Assets [Abstract]
Cash and due from banks		31,998	35,238
Interest bearing deposits		15,605	47,956
Interest bearing deposits - time		3,489	5,591
Trading securities		347	410
Securities available for sale		548,865	610,616
Federal Home Loan Bank and Federal Reserve Bank Stock		15,543	15,543
Net loans and loans held for sale		1,963,227	1,655,335	[1]
Accrued interest receivable		8,740	7,316
Derivative financial instruments		1,973	2,251
Liabilities [Abstract]
Deposits with no stated maturity	[2]	1,808,071	1,740,601
Deposits with stated maturity	[2]	535,690	485,118
Federal funds purchased		3,000
Other borrowings		72,849	9,433
Subordinated debentures		35,569	35,569
Accrued interest payable		1,105	932
Derivative financial instruments		1,073	975
Fair Value [Member]
Assets [Abstract]
Cash and due from banks		31,998	35,238
Interest bearing deposits		15,605	47,956
Interest bearing deposits - time		3,493	5,611
Trading securities		347	410
Securities available for sale		548,865	610,616
Net loans and loans held for sale		1,909,662	1,629,587	[1]
Accrued interest receivable		8,740	7,316
Derivative financial instruments		1,973	2,251
Liabilities [Abstract]
Deposits with no stated maturity	[2]	1,808,071	1,740,601
Deposits with stated maturity	[2]	533,045	483,469
Federal funds purchased		3,000
Other borrowings		73,405	10,371
Subordinated debentures		28,634	25,017
Accrued interest payable		1,105	932
Derivative financial instruments		1,073	975
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and due from banks		31,998	35,238
Interest bearing deposits		15,605	47,956
Interest bearing deposits - time		0	0
Trading securities		347	410
Securities available for sale		0	0
Net loans and loans held for sale		0	0	[1]
Accrued interest receivable		0	5
Derivative financial instruments		0	0
Liabilities [Abstract]
Deposits with no stated maturity	[2]	1,808,071	1,740,601
Deposits with stated maturity	[2]	0	0
Federal funds purchased		0
Other borrowings		0	0
Subordinated debentures		0	0
Accrued interest payable		40	21
Derivative financial instruments		0	0
Significant Other Observable Inputs (Level 2) [Member]
Assets [Abstract]
Cash and due from banks		0	0
Interest bearing deposits		0	0
Interest bearing deposits - time		3,493	5,611
Trading securities		0	0
Securities available for sale		548,865	610,616
Net loans and loans held for sale		47,611	67,321	[1]
Accrued interest receivable		2,850	2,364
Derivative financial instruments		1,973	2,251
Liabilities [Abstract]
Deposits with no stated maturity	[2]	0	0
Deposits with stated maturity	[2]	533,045	483,469
Federal funds purchased		3,000
Other borrowings		73,405	10,371
Subordinated debentures		28,634	25,017
Accrued interest payable		1,065	911
Derivative financial instruments		1,073	975
Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Cash and due from banks		0	0
Interest bearing deposits		0	0
Interest bearing deposits - time		0	0
Trading securities		0	0
Securities available for sale		0	0
Net loans and loans held for sale		1,862,051	1,562,266	[1]
Accrued interest receivable		5,890	4,947
Derivative financial instruments		0	0
Liabilities [Abstract]
Deposits with no stated maturity	[2]	0	0
Deposits with stated maturity	[2]	0	0
Federal funds purchased		0
Other borrowings		0	0
Subordinated debentures		0	0
Accrued interest payable		0	0
Derivative financial instruments		$ 0	$ 0

[1] Net loans and loans held for sale include $31.4 million of payment plan receivables and commercial loans held for sale at December 31, 2016.

[2] Deposits with no stated maturity include reciprocal deposits with a recorded book balance of $13.5 million and $7.4 million at September 30, 2017 and December 31, 2016, respectively. Deposits with a stated maturity include reciprocal deposits with a recorded book balance of $35.5 million and $31.3 million September 30, 2017 and December 31, 2016, respectively.