Consolidated Statements of Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest Income
Loans		$ 225,084	$ 130,853	$ 114,398
Investment securities:
Taxable		3,509	4,883	4,738
Tax-exempt		7,960	3,300	3,396
Interest-bearing deposits		435	1,395	1,270
FHLB stock dividends		958	653	915
Total interest income		237,946	141,084	124,717
Interest Expense
Deposits		26,918	22,613	13,897
Federal Home Loan Bank advances and other		1,691	1,443	1,261
Subordinated debentures		1,300	1,354	1,281
Securities sold under agreement to repurchase		32	25	23
Total interest expense		29,941	25,435	16,462
Net interest income		208,005	115,649	108,255
Credit loss expense - loans and leases	[1]	43,154	2,905	1,176
Credit loss (benefit) expense - unfunded commitments	[1]	1,096	(21)	82
Net interest income after provision for credit losses		163,755	112,765	106,997
Non-interest Income
Service fees and other charges		21,369	14,028	13,100
Mortgage banking income		28,199	9,483	7,077
Insurance commissions		16,788	14,118	14,085
Gain on sale of non-mortgage loans		324	226	317
Gain on sale of securities available for sale		1,464	24	173
Gain on equity securities		90
Wealth management income		6,159	3,127	2,911
Income from Bank Owned Life Insurance		3,306	2,158	1,767
Other non-interest income		2,985	1,792	(222)
Total non-interest income		80,684	44,956	39,208
Non-interest Expense
Compensation and benefits		77,213	57,175	52,566
Occupancy		16,320	9,027	8,641
FDIC insurance premium		3,355	484	1,021
Financial institutions tax		4,173	2,194	2,118
Data processing		14,886	8,055	8,555
Acquisition related charges		19,485	1,422
Amortization of intangibles		6,449	1,119	1,312
Other non-interest expense		23,289	17,608	15,117
Total non-interest expense		165,170	97,084	89,330
Income before income taxes		79,269	60,637	56,875
Federal income taxes		16,192	11,267	10,626
Net Income		$ 63,077	$ 49,370	$ 46,249
Earnings per common share (Note 4)
Basic		$ 1.75	$ 2.49	$ 2.27
Diluted		$ 1.75	$ 2.48	$ 2.26

[1] Beginning January 1, 2020, calculation is based on current expected loss methodology.  Prior to January 1, 2020, calculation was based on incurred loss methodology.