Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Two River Bancorp Inc.	Country Bank Holding Company, Inc	Cumulative Effect, Period Of Adoption, Adjustment	Employee Stock Ownership Plan	Preferred Stock	Common Stock	Common Stock Two River Bancorp Inc.	Common Stock Country Bank Holding Company, Inc	Additional Paid-In Capital	Additional Paid-In Capital Two River Bancorp Inc.	Additional Paid-In Capital Country Bank Holding Company, Inc	Retained Earnings	Retained Earnings Cumulative Effect, Period Of Adoption, Adjustment	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Treasury Stock Two River Bancorp Inc.
Beginning Balance at Dec. 31, 2019	$ 1,153,119			$ (4)	$ (8,648)	$ 0	$ 519			$ 840,691			$ 358,668	$ (4)	$ (1,208)	$ (36,903)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	35,171												35,171
Other comprehensive income (loss), net of tax	2,333														2,333
Stock compensation	2,479						2			2,477
Allocation of ESOP stock	608				607					1
Cash dividend per share	(20,494)												(20,494)
Exercise of stock options	878						2			1,665			(789)
Issuance of preferred equity	55,713					1				55,712
Repurchased shares of common stock	(14,814)															(14,814)
Acquisition, value		$ 148,609	$ 112,836					$ 42	$ 44		$ 122,501	$ 112,792					$ 26,066
Ending Balance at Jun. 30, 2020	1,476,434				(8,041)	1	609			1,135,839			372,552		1,125	(25,651)
Beginning Balance at Mar. 31, 2020	1,409,834				(8,344)	0	609			1,078,438			364,273		509	(25,651)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,638												18,638
Other comprehensive income (loss), net of tax	616														616
Stock compensation	1,371									1,371
Allocation of ESOP stock	261				303					(42)
Cash dividend per share	(10,220)												(10,220)
Exercise of stock options	221									360			(139)
Issuance of preferred equity	55,713					1				55,712
Ending Balance at Jun. 30, 2020	1,476,434				(8,041)	1	609			1,135,839			372,552		1,125	(25,651)
Beginning Balance at Dec. 31, 2020	1,484,130				(7,433)	1	609			1,137,715			378,268		621	(25,651)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	63,252												63,252
Other comprehensive income (loss), net of tax	(595)														(595)
Stock compensation	2,726						0			2,726
Allocation of ESOP stock	720				609					111
Cash dividend per share	(20,325)												(20,325)
Exercise of stock options	1,828						2			3,355			(1,529)
Repurchased shares of common stock	(20,939)															(20,939)
Preferred stock dividend	(2,008)												(2,008)
Ending Balance at Jun. 30, 2021	1,508,789				(6,824)	1	611			1,143,907			417,658		26	(46,590)
Beginning Balance at Mar. 31, 2021	1,498,719				(7,129)	1	610			1,142,290			398,280		312	(35,645)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	30,555												30,555
Other comprehensive income (loss), net of tax	(286)														(286)
Stock compensation	1,489									1,489
Allocation of ESOP stock	368				305					63
Cash dividend per share	(10,173)												(10,173)
Exercise of stock options	66						1			65
Repurchased shares of common stock	(10,945)															(10,945)
Preferred stock dividend	(1,004)												(1,004)
Ending Balance at Jun. 30, 2021	$ 1,508,789				$ (6,824)	$ 1	$ 611			$ 1,143,907			$ 417,658		$ 26	$ (46,590)