Parent Company Statements - Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021
Operating Activities:
Net Income		$ 37,397		$ 54,806		$ 29,319
Stock compensation expense		1,103		1,142		696
Net change in other assets		9,736		(13,261)		(4,321)
(Decrease) Increase in other liabilities		(4,214)		2,439		15,215
Net Cash Provided By Operating Activities		51,937		59,991		65,899
Investing Activities:
Net Cash (Used In) Provided by Investing Activities		(408,521)		(704,711)		169,371
Financing Activities:
Dividends paid		(12,981)		(12,735)		(8,872)
Employee and Director Stock Purchase Plans stock issuance		482		364		307
Proceeds from issuance of common stock	[1]	0		0		70,238
Treasury stock purchased		(4,876)		(2,957)		(128)
Riverview restricted stock (1)	[2]	0		776		0
Net cash (used in) provided by financing activities		392,466		(208,151)		374,758
Net increase (decrease) in cash and cash equivalents		35,882		(852,871)		610,028
Cash and cash equivalents, beginning of period		60,881		913,752		303,724
Cash and cash equivalents, end of period		96,763		$ 60,881		913,752
Restricted stock shares paid out in cash (in shares)				2,500
Common stock issued to shareholders in acquisition		18,095	[3]	$ 776	[4]	142,192	[5]
Parent Company
Operating Activities:
Net Income		37,397		54,806		29,319
Equity in undistributed earnings of subsidiaries		(45,183)		(60,307)		(37,638)
Stock compensation expense		1,103		1,142		696
Amortization of debt issuance costs		7		26		26
Net change in other assets		(3,407)		759		(1,735)
(Decrease) Increase in other liabilities		(246)		(6,285)		13,356
Net Cash Provided By Operating Activities		(10,329)		(9,859)		4,024
Investing Activities:
Net cash paid for acquisition		(25,574)		0		(792)
Investment in subsidiary		71,493		(1,787)		(27,353)
Net Cash (Used In) Provided by Investing Activities		45,919		(1,787)		(28,145)
Financing Activities:
Dividends paid		(12,981)		(12,735)		(8,872)
Proceeds from issuance of common stock		0		0		70,545
Treasury stock purchased		(4,876)		(2,957)		(128)
Riverview restricted stock (1)		0		776		0
Subordinated debt and trust preferred securities redemption		(10,000)		(16,778)		(6,870)
Other, net		0		0		(283)
Net cash (used in) provided by financing activities		(27,375)		(31,330)		54,699
Net increase (decrease) in cash and cash equivalents		8,215		(42,976)		30,578
Cash and cash equivalents, beginning of period		1,849		44,825		14,247
Cash and cash equivalents, end of period		10,064		1,849		44,825
Parent Company | Employee
Financing Activities:
Employee and Director Stock Purchase Plans stock issuance		$ 482		$ 364		$ 307

[1] Shares issued in offering were net of expenses of $4.6 million.

[2] Additionally, 2,500 shares of restricted stock were paid out in cash resulting in $776 thousand of cash consideration relating to stock awards.

[3] Shares issued as a result of the acquisition of Brunswick Bancorp ("Brunswick"). See "Note 2 - Business Combinations", to the Consolidated Financial Statements for more information.

[4] Additionally, 2,500 shares of restricted stock were paid out in cash resulting in $776 thousand of cash consideration relating to stock awards.

[5] Shares issued as a result of the acquisition of Riverview Financial Corporation ("Riverview").