CONSOLIDATED INCOME STATEMENTS - UNAUDITED - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest income:
Loans	$ 55,134	$ 56,510	$ 110,018	$ 110,345
Securities	6,539	6,186	13,536	12,351
FHLB stock, fed funds sold and interest-bearing deposits	259	612	716	1,156
Total interest income	61,932	63,308	124,270	123,852
Interest expense:
Deposits	10,914	16,296	25,560	31,744
Borrowings	2,571	5,125	5,395	9,174
Total interest expense	13,485	21,421	30,955	40,918
Net interest income	48,447	41,887	93,315	82,934
Provision for credit losses	1,367	1,231	5,431	1,771
Net interest income after provision for credit losses	47,080	40,656	87,884	81,163
Noninterest income:
Revenue from contract with customers	$ 6,733	$ 7,136	$ 14,495	$ 13,930
Type of Revenue [Extensible List]	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember	us-gaap:InvestmentAdvisoryManagementAndAdministrativeServiceMember
Other income	$ 2,236	$ 1,995	$ 5,149	$ 3,666
Total noninterest income	8,969	9,131	19,644	17,596
Noninterest expense:
Compensation and benefits	18,288	17,333	38,145	36,235
Occupancy and depreciation	5,855	5,167	11,367	10,035
Professional services and marketing costs	2,049	2,024	3,803	4,028
Customer service costs	1,622	4,283	3,994	7,672
Other expenses	3,123	3,475	6,500	7,257
Total noninterest expense	30,937	32,282	63,809	65,227
Income before taxes on income	25,112	17,505	43,719	33,532
Taxes on income	7,258	5,095	12,654	9,863
Net income	$ 17,854	$ 12,410	$ 31,065	$ 23,669
Net income per share:
Basic	$ 0.40	$ 0.28	$ 0.70	$ 0.53
Diluted	$ 0.40	$ 0.28	$ 0.69	$ 0.53
Shares used in computation:
Basic	44,620,716	44,625,673	44,645,189	44,583,503
Diluted	44,812,369	44,894,720	44,882,520	44,846,779