CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common  stock	Additional paid-in capital	Retained earnings	Retained earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated other comprehensive income/(loss)
Balance at beginning of the period at Dec. 31, 2019	$ 1,353,285	$ (9,649)	$ 1,069	$ 805,750	$ 583,407	$ (9,649)	$ (36,941)
Net income
Net income	74,854				74,854
Other comprehensive (loss) income net of tax	3,392						3,392
Total comprehensive income	78,246				74,854		3,392
Acquisition of Mutual Bank	213,406		206	213,200
Exercise of stock options	1,479		1	1,478
Share repurchases	(9,276)		(7)	(9,269)
Stock-based compensation expense	4,239		3	4,236
Stock-based compensation forfeited	0		(2)	2
Other	105			105
Dividends paid	(93,132)				(93,132)
Balance at end of the period at Dec. 31, 2020	1,538,703		1,270	1,015,502	555,480		(33,549)
Net income
Net income	154,323				154,323
Other comprehensive (loss) income net of tax	(4,080)						(4,080)
Total comprehensive income	150,243				154,323		(4,080)
Exercise of stock options	14,011		12	13,999
Share repurchases	(23,854)		(18)	(23,836)
Stock-based compensation expense	4,742		3	4,739
Stock-based compensation forfeited	0		(1)	1
Dividends paid	(100,274)				(100,274)
Balance at end of the period at Dec. 31, 2021	1,583,571		1,266	1,010,405	609,529		(37,629)
Net income
Net income	133,666				133,666
Other comprehensive (loss) income net of tax	(133,529)						(133,529)
Total comprehensive income	137				133,666		(133,529)
Exercise of stock options	5,173		4	5,169
Stock-based compensation expense	4,074		1	4,073
Stock-based compensation forfeited	(1)		(1)
Dividends paid	(101,468)				(101,468)
Balance at end of the period at Dec. 31, 2022	$ 1,491,486		$ 1,270	$ 1,019,647	$ 641,727		$ (171,158)