Allowance for Loan Losses - Summary of Changes in Loan Allowance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ 1,822
Financing Receivable, Allowance for Credit Loss, Writeoff	(1,597)
Schedule of changes in allowance for loan losses
Beginning Balance	36,171		$ 35,042
Recoveries	(1,180)
Recoveries			894
Provision for Credit Losses	9,964		920
Ending Balance		$ 36,171	36,152
Financing Receivable, Allowance for Credit Loss	47,540
Amortized Cost [Member]
Schedule of changes in allowance for loan losses
Provision for Credit Losses	3,100
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	(2,935)
Financing Receivable, Allowance for Credit Loss, Writeoff	(1,222)
Schedule of changes in allowance for loan losses
Beginning Balance	23,933		23,711
Recoveries	(1,069)
Recoveries			159
Provision for Credit Losses	7,021		1,069
Ending Balance		23,933	24,836
Financing Receivable, Allowance for Credit Loss	27,866
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	(1,348)
Financing Receivable, Allowance for Credit Loss, Writeoff	(1,087)
Schedule of changes in allowance for loan losses
Beginning Balance	11,739		11,343
Recoveries	(1,057)
Recoveries			7
Provision for Credit Losses	3,539		508
Ending Balance		11,739	11,755
Financing Receivable, Allowance for Credit Loss	13,900
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	452
Financing Receivable, Allowance for Credit Loss, Writeoff	(135)
Schedule of changes in allowance for loan losses
Beginning Balance	4,512		4,898
Recoveries	(12)
Recoveries			3
Provision for Credit Losses	1,375		355
Ending Balance		4,512	5,256
Financing Receivable, Allowance for Credit Loss	6,216
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	(2,039)
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Schedule of changes in allowance for loan losses
Beginning Balance	7,682		7,470
Recoveries	0
Recoveries			149
Provision for Credit Losses	2,107		206
Ending Balance		7,682	7,825
Financing Receivable, Allowance for Credit Loss	7,750
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	1,471
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Schedule of changes in allowance for loan losses
Beginning Balance	1,458		1,203
Recoveries	(3)
Recoveries			0
Provision for Credit Losses	94		59
Ending Balance		1,458	1,247
Financing Receivable, Allowance for Credit Loss	3,026
Real Estate Construction and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	6,669
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Schedule of changes in allowance for loan losses
Beginning Balance	3,060		2,194
Recoveries	(14)
Recoveries			618
Provision for Credit Losses	2,565		(395)
Ending Balance		3,060	2,417
Financing Receivable, Allowance for Credit Loss	12,308
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	(571)
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Schedule of changes in allowance for loan losses
Beginning Balance	1,455		1,240
Recoveries	(14)
Recoveries			618
Provision for Credit Losses	(34)		(436)
Ending Balance		1,455	1,422
Financing Receivable, Allowance for Credit Loss	864
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	7,240
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Schedule of changes in allowance for loan losses
Beginning Balance	1,605		954
Recoveries	0
Recoveries			0
Provision for Credit Losses	2,599		41
Ending Balance		1,605	995
Financing Receivable, Allowance for Credit Loss	11,444
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	(2,484)
Financing Receivable, Allowance for Credit Loss, Writeoff	(375)
Schedule of changes in allowance for loan losses
Beginning Balance	6,821		6,581
Recoveries	(94)
Recoveries			117
Provision for Credit Losses	284		368
Ending Balance		6,821	6,480
Financing Receivable, Allowance for Credit Loss	4,340
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	(899)
Financing Receivable, Allowance for Credit Loss, Writeoff	0
Schedule of changes in allowance for loan losses
Beginning Balance	899		1,353
Recoveries	0
Recoveries			0
Provision for Credit Losses	0		(181)
Ending Balance		$ 899	$ 1,172
Financing Receivable, Allowance for Credit Loss	0
Total Allowance for Credit Losses [Member]
Schedule of changes in allowance for loan losses
Financing Receivable, Allowance for Credit Loss	$ 47,540
Unemployment Rate [Member]
Schedule of changes in allowance for loan losses
Current Expected Credit Losses Model Valuation Input	6.00%	3.70%
COVID-19 [Member]
Schedule of changes in allowance for loan losses
Provision for Credit Losses	$ 6,900
Current Expected Credit Losses Model Valuation Input	0.20%
Prior to COVID-19 [Member]
Schedule of changes in allowance for loan losses
Current Expected Credit Losses Model Valuation Input	1.70%