Loans and Allowance for Loan and Lease Losses - Summary of Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 19,093	$ 12,093	$ 15,405	$ 12,567
Provision for loan losses	1,447	1,939	9,125	1,428
Charge-offs	(1,083)	(779)	(5,398)	(846)
Recoveries	340	519	665	623
Ending Balance	19,797	13,772	19,797	13,772
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	2,243	1,619	1,813	1,489
Provision for loan losses	263	161	830	290
Charge-offs		(1)	(137)	(1)
Recoveries		13		14
Ending Balance	2,506	1,792	2,506	1,792
Construction, land development, land
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	566	198	465	367
Provision for loan losses	512	(17)	1,025	(186)
Charge-offs	(163)		(582)
Recoveries			7
Ending Balance	915	181	915	181
1-4 family residential properties
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	160	285	253	274
Provision for loan losses	(25)	(50)	(95)	(28)
Charge-offs		(47)	(28)	(63)
Recoveries	14	71	19	76
Ending Balance	149	259	149	259
Farmland
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	214	133	170	134
Provision for loan losses	47	10	91	9
Ending Balance	261	143	261	143
Commercial Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	11,177	5,331	8,014	5,276
Provision for loan losses	(504)	1,134	5,289	1,159
Charge-offs	(226)	(169)	(3,078)	(169)
Recoveries	156	401	378	431
Ending Balance	10,603	6,697	10,603	6,697
Factored receivables
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	4,064	4,110	4,088	4,509
Provision for loan losses	814	524	1,333	84
Charge-offs	(386)	(450)	(966)	(458)
Recoveries	15	20	52	69
Ending Balance	4,507	4,204	4,507	4,204
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	547	222	420	216
Provision for loan losses	233	169	605	199
Charge-offs	(308)	(112)	(607)	(155)
Recoveries	155	14	209	33
Ending Balance	627	293	627	293
Mortgage warehouse
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	122	195	182	302
Provision for loan losses	107	8	47	(99)
Ending Balance	$ 229	$ 203	$ 229	$ 203

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

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Amount of expense related to estimated loss from loan and lease transactions.

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