Business Segment Information - Operating Statements (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Operating Income
Interest income	$ 50,174			$ 39,907			$ 133,636	$ 113,300
Total interest expense	2,133			1,725			5,495	5,284
Net interest income	48,041			38,182			128,141	108,016
Provision for (recapture of) credit losses on loans	1,006			(514)			258	(2,519)
Net interest income after provision	47,035			38,696			127,883	110,535
Noninterest income	2,781			2,408			7,339	6,878
Noninterest expense	23,899			21,831			70,341	70,850
Income before income taxes	25,917			19,273			64,881	46,563
Income tax expense	7,848			5,555			19,125	12,828
Net income	18,069	$ 14,821	$ 12,866	13,718	$ 8,813	$ 11,204	45,756	33,735
Total assets	5,431,262			5,463,002			5,431,262	5,463,002	$ 5,499,409
Loans, net of deferred fees	3,216,473			2,832,859			3,216,473	2,832,859	3,087,326
Goodwill	167,631			167,631			167,631	167,631	167,631
Banking
Operating Income
Interest income	46,973			37,093			124,513	105,064
Intersegment interest allocations	329			219			887	632
Total interest expense	2,133			1,725			5,495	5,284
Net interest income	45,169			35,587			119,905	100,412
Provision for (recapture of) credit losses on loans	1,126			(588)			259	(2,537)
Net interest income after provision	44,043			36,175			119,646	102,949
Noninterest income	2,677			2,313			7,049	6,522
Noninterest expense	22,216			20,428			65,542	66,656
Intersegment expense allocations	128			69			370	302
Income before income taxes	24,632			18,129			61,523	43,117
Income tax expense	7,468			5,217			18,132	11,809
Net income	17,164			12,912			43,391	31,308
Total assets	5,355,212			5,392,948			5,355,212	5,392,948
Loans, net of deferred fees	3,155,923			2,776,114			3,155,923	2,776,114
Goodwill	154,587			154,587			154,587	154,587	154,587
Factoring
Operating Income
Interest income	3,201			2,814			9,123	8,236
Intersegment interest allocations	(329)			(219)			(887)	(632)
Net interest income	2,872			2,595			8,236	7,604
Provision for (recapture of) credit losses on loans	(120)			74			(1)	18
Net interest income after provision	2,992			2,521			8,237	7,586
Noninterest income	104			95			290	356
Noninterest expense	1,683			1,403			4,799	4,194
Intersegment expense allocations	(128)			(69)			(370)	(302)
Income before income taxes	1,285			1,144			3,358	3,446
Income tax expense	380			338			993	1,019
Net income	905			806			2,365	2,427
Total assets	76,050			70,054			76,050	70,054
Loans, net of deferred fees	60,550			56,745			60,550	56,745
Goodwill	$ 13,044			$ 13,044			$ 13,044	$ 13,044	$ 13,044