CONSOLIDATED INCOME STATEMENTS - UNAUDITED - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest income:
Loans	$ 56,510	$ 43,535	$ 110,345	$ 82,506
Securities AFS	6,186	3,575	12,351	6,997
Fed funds sold, FHLB stock and deposits	612	1,388	1,156	2,314
Total interest income	63,308	48,498	123,852	91,817
Interest expense:
Deposits	16,296	8,084	31,744	13,956
Borrowings	5,125	4,163	9,174	7,342
Total interest expense	21,421	12,247	40,918	21,298
Net interest income	41,887	36,251	82,934	70,519
Provision for loan losses	1,231	2,450	1,771	4,138
Net interest income after provision for loan losses	40,656	33,801	81,163	66,381
Noninterest income:
Revenue from contract with customers	$ 7,136	$ 7,088	$ 13,930	$ 14,269
Type of Revenue [Extensible List]	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember
Gain (loss) on sale of loans		$ (1,490)		$ (945)
Other income	$ 1,995	1,386	$ 3,666	2,642
Total noninterest income	9,131	6,984	17,596	15,966
Noninterest expense:
Compensation and benefits	17,333	16,645	36,235	33,814
Occupancy and depreciation	5,167	4,763	10,035	8,934
Professional services and marketing costs	2,024	1,820	4,028	4,309
Customer service costs	4,283	3,824	7,672	6,595
Other expenses	3,475	6,930	7,257	9,318
Total noninterest expense	32,282	33,982	65,227	62,970
Income before taxes on income	17,505	6,803	33,532	19,377
Taxes on income	5,095	1,657	9,863	5,255
Net income	$ 12,410	$ 5,146	$ 23,669	$ 14,122
Net income per share:
Basic	$ 0.28	$ 0.13	$ 0.53	$ 0.36
Diluted	$ 0.28	$ 0.12	$ 0.53	$ 0.35
Shares used to compute net income per share:
Basic	44,625,673	40,820,006	44,583,503	39,704,834
Diluted	44,894,720	41,332,192	44,846,779	40,234,560