Reportable Segments (Schedule of financial information for each reportable segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Interest income	$ 23,486	$ 23,415	$ 69,031	$ 71,271
Interest expense	1,314	2,778	4,156	12,764
Net interest income (loss)	22,172	20,637	64,875	58,507
Provision for loan losses	(6,000)	11,100	(8,200)	27,300
Noninterest income	4,239	7,584	13,764	20,708
Noninterest expense	14,039	14,183	41,695	39,198
Net income (loss) before taxes	18,372	2,938	45,144	12,717
Income tax provision (benefit)	4,355	721	10,438	2,990
Net income (loss)	14,017	2,217	34,706	9,727
Total assets	2,784,176	2,479,411	2,784,176	2,479,411	$ 2,482,587
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Interest income	(4)	(3)	(12)	(13)
Interest expense	(4)	(3)	(12)	(13)
Net interest income (loss)
Provision for loan losses
Noninterest income
Noninterest expense
Net income (loss) before taxes
Income tax provision (benefit)
Net income (loss)
Total assets	(301,828)	(254,191)	(301,828)	(254,191)
Commercial And Retail Banking [Member]
Segment Reporting Information [Line Items]
Interest income	23,253	23,102	68,053	70,480
Interest expense	938	2,396	3,025	11,452
Net interest income (loss)	22,315	20,706	65,028	59,028
Provision for loan losses	(6,000)	11,100	(8,200)	27,300
Noninterest income	1,410	1,307	4,319	5,987
Noninterest expense	11,980	11,445	34,384	32,134
Net income (loss) before taxes	17,745	(532)	43,163	5,581
Income tax provision (benefit)	4,195	(128)	10,023	1,491
Net income (loss)	13,550	(404)	33,140	4,090
Total assets	2,750,703	2,411,966	2,750,703	2,411,966
Mortgage Banking [Member]
Segment Reporting Information [Line Items]
Interest income	233	313	978	791
Interest expense
Net interest income (loss)	233	313	978	791
Provision for loan losses
Noninterest income	2,829	6,277	9,445	14,721
Noninterest expense	1,956	2,666	7,086	6,841
Net income (loss) before taxes	1,106	3,924	3,337	8,671
Income tax provision (benefit)	261	944	700	1,821
Net income (loss)	845	2,980	2,637	6,850
Total assets	33,047	66,915	33,047	66,915
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Interest income	4	3	12	13
Interest expense	380	385	1,143	1,325
Net interest income (loss)	(376)	(382)	(1,131)	(1,312)
Provision for loan losses
Noninterest income
Noninterest expense	103	72	225	223
Net income (loss) before taxes	(479)	(454)	(1,356)	(1,535)
Income tax provision (benefit)	(101)	(95)	(285)	(322)
Net income (loss)	(378)	(359)	(1,071)	(1,213)
Total assets	$ 302,254	$ 254,721	$ 302,254	$ 254,721