Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Assets [Abstract]
Securities available for sale		$ 1,400,137	$ 1,412,830
Federal Home Loan Bank and Federal Reserve Bank Stock		17,653	18,427
Liabilities [Abstract]
Other borrowings		30,006	30,009
Subordinated debt		39,376	39,357
Subordinated debentures		39,609	39,592
Reciprocal deposits included in deposits with no stated maturity		576,421	562,210
Reciprocal deposits included in deposits with stated maturity		28,911	24,416
Recorded Book Balance [Member]
Assets [Abstract]
Cash and due from banks		46,600	51,069
Interest bearing deposits		63,221	58,404
Securities available for sale		1,400,137	1,412,830
Federal Home Loan Bank and Federal Reserve Bank Stock		17,653	18,427
Net loans and loans held for sale		2,987,952	2,948,074
Accrued interest receivable		12,815	12,865
Derivative financial instruments		20,557	12,283
Liabilities [Abstract]
Deposits with no stated maturity	[1]	3,867,260	3,781,298
Deposits with stated maturity	[1]	338,238	335,792
Other borrowings		30,006	30,009
Subordinated debt		39,376	39,357
Subordinated debentures		39,609	39,592
Accrued interest payable		1,133	497
Derivative financial instruments		9,045	5,961
Fair Value [Member]
Assets [Abstract]
Cash and due from banks		46,600	51,069
Interest bearing deposits		63,221	58,404
Securities available for sale		1,400,137	1,412,830
Net loans and loans held for sale		2,858,273	2,931,079
Accrued interest receivable		12,815	12,865
Derivative financial instruments		20,557	12,283
Liabilities [Abstract]
Deposits with no stated maturity		3,867,260	3,781,298
Deposits with stated maturity		351,269	336,006
Other borrowings		30,003	30,155
Subordinated debt		44,292	44,999
Subordinated debentures		35,651	33,866
Accrued interest payable		1,133	497
Derivative financial instruments		9,045	5,961
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets [Abstract]
Cash and due from banks		46,600	51,069
Interest bearing deposits		63,221	58,404
Securities available for sale		0	0
Net loans and loans held for sale		0	35,233
Accrued interest receivable		2	1
Derivative financial instruments		0	0
Liabilities [Abstract]
Deposits with no stated maturity		3,867,260	3,781,298
Deposits with stated maturity		0	0
Other borrowings		0	0
Subordinated debt		0	0
Subordinated debentures		0	0
Accrued interest payable		68	67
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
Securities available for sale		1,400,137	1,412,830
Net loans and loans held for sale		29,514	55,470
Accrued interest receivable		6,136	6,028
Derivative financial instruments		20,557	12,283
Liabilities [Abstract]
Deposits with no stated maturity		0	0
Deposits with stated maturity		351,269	336,006
Other borrowings		30,003	30,155
Subordinated debt		44,292	44,999
Subordinated debentures		35,651	33,866
Accrued interest payable		1,065	430
Derivative financial instruments		9,045	5,961
Significant Unobservable Inputs (Level 3) [Member]
Assets [Abstract]
Cash and due from banks		0	0
Interest bearing deposits		0	0
Securities available for sale		0	0
Net loans and loans held for sale		2,828,759	2,840,376
Accrued interest receivable		6,677	6,836
Derivative financial instruments		0	0
Liabilities [Abstract]
Deposits with no stated maturity		0	0
Deposits with stated maturity		0	0
Other borrowings		0	0
Subordinated debt		0	0
Subordinated debentures		0	0
Accrued interest payable		0	0
Derivative financial instruments		$ 0	$ 0

[1] Deposits with no stated maturity include reciprocal deposits with a recorded book balance of $576.421 million and $562.210 million at March 31, 2022 and December 31, 2021, respectively. Deposits with a stated maturity include reciprocal deposits with a recorded book balance of $28.911 million and $24.416 million at March 31, 2022 and December 31, 2021, respectively.