Business Segment Information - Operating Statements (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Operating Income
Interest income	$ 37,132		$ 33,489		$ 78,074	$ 66,938
Total interest expense	2,192		2,573		4,554	4,980
Net interest income	34,940		30,916		73,520	61,958
Provision for credit losses on loans	1,114		(740)		14,384	(1,801)
Net interest income after provision	33,826		31,656		59,136	63,759
Noninterest income	2,078		2,765		5,271	5,233
Noninterest expense	21,012		18,445		46,786	36,363
Income before income taxes	14,892		15,976		17,621	32,629
Income tax expense	4,274		4,623		5,142	9,130
Net income	10,618	$ 1,861	11,353	$ 12,146	12,479	23,499
Total assets	4,614,401		3,108,031		4,614,401	3,108,031	$ 4,109,463
Loans, net of deferred fees	2,686,389		1,877,767		2,686,389	1,877,767	2,533,844
Goodwill	167,631		83,753		167,631	83,753	$ 167,420
Business Combination, Acquisition Related Costs	59		540		2,483	540
Total merger-related costs	59		540		2,483	540
Banking
Operating Income
Interest income	34,570		30,521		72,635	61,017
Intersegment interest allocations	218		292		502	606
Total interest expense	2,192		2,573		4,554	4,980
Net interest income	32,596		28,240		68,583	56,643
Provision for credit losses on loans	1,107		(744)		13,981	(1,636)
Net interest income after provision	31,489		28,984		54,602	58,279
Noninterest income	1,883		2,641		4,906	4,873
Noninterest expense	19,336		16,784		43,519	32,985
Intersegment expense allocations	106		132		235	253
Income before income taxes	14,142		14,973		16,224	30,420
Income tax expense	4,052		4,327		4,729	8,477
Net income	10,090		10,646		11,495	21,943
Total assets	4,546,199		3,045,378		4,546,199	3,045,378
Loans, net of deferred fees	2,644,480		1,827,936		2,644,480	1,827,936
Goodwill	154,587		70,709		154,587	70,709
Factoring
Operating Income
Interest income	2,562		2,968		5,439	5,921
Intersegment interest allocations	(218)		(292)		(502)	(606)
Net interest income	2,344		2,676		4,937	5,315
Provision for credit losses on loans	7		4		403	(165)
Net interest income after provision	2,337		2,672		4,534	5,480
Noninterest income	195		124		365	360
Noninterest expense	1,676		1,661		3,267	3,378
Intersegment expense allocations	(106)		(132)		(235)	(253)
Income before income taxes	750		1,003		1,397	2,209
Income tax expense	222		296		413	653
Net income	528		707		984	1,556
Total assets	68,202		62,653		68,202	62,653
Loans, net of deferred fees	41,909		49,831		41,909	49,831
Goodwill	$ 13,044		$ 13,044		$ 13,044	$ 13,044