CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating activities:
Net income		$ 26,192,000	$ 47,434,000	$ 44,170,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		3,127,000	3,122,000	3,127,000
Amortization of premium and accretion of discount on securities, net		5,009,000	1,782,000	1,399,000
Amortization of restricted stock		6,875,000	5,909,000	4,445,000
Amortization of intangible assets		1,287,000	1,043,000	1,187,000
Amortization of subordinated debt costs		224,000	224,000	169,000
Provision for loan and lease losses		32,400,000	4,000,000	3,550,000
Valuation allowance loans held for sale		4,425,000		232,000
Stock-based compensation and employee stock purchase plan expense		224,000	158,000	189,000
Deferred tax expense		8,225,000	10,013,000	17,042,000
Fair value adjustment for equity security		(281,000)	(117,000)	105,000
Loss on sale of securities, available for sale, net				288,000
Proceeds from sales of loans held for sale	[1]	187,704,000	73,709,000	44,483,000
Loans originated for sale	[1]	(194,735,000)	(75,588,000)	(44,075,000)
Gain on loans held for sale	[1]	(5,032,000)	(2,866,000)	(1,970,000)
(Gain)/loss on sale of loans held for sale at lower of cost or fair value		(7,426,000)	10,000	4,392,000
Loss on sale of other real estate owned				58,000
Gain on death benefit				(3,000,000)
Increase in cash surrender value of life insurance, net of split dollar liability		(681,000)	(775,000)	(767,000)
(Increase)/decrease in accrued interest receivable		(12,001,000)	328,000	(1,362,000)
(Increase)/decrease in other assets		(8,096,000)	5,111,000	(8,485,000)
(Decrease)/increase in accrued expenses and other liabilities		(10,720,000)	12,799,000	(929,000)
Net cash provided by operating activities		36,720,000	86,296,000	64,248,000
Investing activities:
Principal repayments, maturities and calls of securities available for sale		217,072,000	208,625,000	79,313,000
Redemptions for FHLB & FRB stock		39,462,000	34,427,000	87,602,000
Sales of securities available for sale		0	0	19,542,000
Purchase of securities available for sale		(448,053,000)	(209,971,000)	(156,893,000)
Purchase of equity securities		(4,000,000)	(6,000,000)
Purchase of FHLB & FRB stock		(29,103,000)	(39,962,000)	(92,758,000)
Proceeds from sale of loans held for sale at lower of cost or fair value		372,406,000	4,984,000	126,898,000
Net increase in loans, net of participations sold		(354,544,000)	(478,099,000)	(358,652,000)
Sales of other real estate owned			336,000	1,800,000
Purchases of premises and equipment		(3,075,000)	(1,705,000)	(1,059,000)
Purchase of wealth management company		(4,160,000)	(2,600,000)	(3,500,000)
Proceeds from death benefit			3,000,000
Net cash used in investing activities		(213,995,000)	(486,965,000)	(297,707,000)
Financing activities:
Net increase in deposits		574,973,000	348,171,000	196,986,000
Net (decrease)/increase in short-term borrowings		(113,100,000)	128,100,000
Proceeds from FHLB advances				105,000,000
Proceeds from Paycheck Protection Program Liquidity Facility		535,838,000
Repayments of Paycheck Protection Program Liquidity Facility		358,752,000
Repayments of FHLB advances		(105,000,000)	(3,000,000)	(34,898,000)
Dividends paid on common stock		(3,780,000)	(3,865,000)	(3,712,000)
Exercise of stock options, net stock swaps		230,000	251,000	275,000
Restricted stock repurchased on vesting to pay taxes		(741,000)	(1,106,000)	(1,540,000)
Proceeds from issuance of subordinated debt		98,153,000
Sale of common shares (Dividend Reinvestment Program)				16,677,000
Issuance of shares for employee’s savings and investment plan				1,039,000
Issuance of shares for employee stock purchase plan		1,078,000	532,000	958,000
Purchase of treasury shares		(6,487,000)	(21,002,000)
Net cash provided by financing activities		622,412,000	448,081,000	280,785,000
Net increase in cash and cash equivalents		445,137,000	47,412,000	47,326,000
Cash and cash equivalents at beginning of year		208,185,000	160,773,000	113,447,000
Cash and cash equivalents at end of year		653,322,000	208,185,000	160,773,000
Cash paid during the year for:
Interest		38,281,000	60,293,000	42,768,000
Income taxes, net		9,786,000	3,595,000	3,605,000
Transfer of loans to loans held for sale		367,477,000	15,064,000	137,317,000
Transfer of loans to other real estate owned			386,000
Security purchase settled in subsequent period			7,959,000
Acquisitions (Note 21)
Goodwill		2,895,000	5,791,000	7,310,000
Customer relationship & other intangibles		$ 1,695,000	3,441,000	$ 2,440,000
Right-of-use asset obtained in exchange for lease obligation			$ 7,012,000

[1] Includes mortgage loans originated with the intent to sell which are carried at fair value. In addition, this includes the guaranteed portion of SBA loans which are carried at the lower of cost or fair value.