CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2018		$ 412,546	$ 15,542	$ 211,345	$ (16,717)	$ (8,789)	$ 613,927
Net income				73,395			73,395
Other comprehensive income (loss), net of tax						7,642	7,642
Cash dividends declared on common stock				(12,958)			(12,958)
Repurchase of stock					(12,643)		(12,643)
Net shares issued in satisfaction of restricted stock units earned
Exercise of stock options			360				360
Restricted stock, net of forfeitures
Net shares issued in satisfaction of performance units earned			196				196
Stock issued in acquisition of GHB		56,025					56,025
Stock issued in acquisition of BoeFly, LLC			2,500				2,500
Stock-based compensation expense			2,746				2,746
Balance at Dec. 31, 2019		468,571	21,344	271,782	(29,360)	(1,147)	731,190
Net income				71,289			71,289
Other comprehensive income (loss), net of tax						3,944	3,944
Cash dividends declared on common stock				(11,120)			(11,120)
Repurchase of stock					(911)		(911)
Net shares issued in satisfaction of restricted stock units earned
Exercise of stock options			233				233
Restricted stock grants, net of forfeitures
Stock grants issued
Net shares issued in satisfaction of performance units earned
Share redemption for tax withholdings on performance units and restricted stock units earned			(639)				(639)
Stock issued in acquisition of Bancorp of New Jersey		118,375					118,375
Stock-based compensation expense			2,949				2,949
Balance at Dec. 31, 2020		586,946	23,887	331,951	(30,271)	2,797	915,310
Cumulative effect of change in accounting principle (see note 1b. "Authoritative Accounting Guidance Presentation"), net of tax				(2,925)			(2,925)
Balance on January 1 at Dec. 31, 2020		586,946	23,887	329,026	(30,271)	2,797	912,385
Net income				130,353			130,353
Other comprehensive income (loss), net of tax						(4,201)	(4,201)
Cash dividends declared on preferred stock				(1,717)			(1,717)
Cash dividends declared on common stock				(17,493)			(17,493)
Repurchase of stock					(9,401)		(9,401)
Net shares issued in satisfaction of restricted stock units earned
Exercise of stock options			106				106
Restricted stock grants, net of forfeitures
Stock grants issued
Net shares issued in satisfaction of performance units earned
Share redemption for tax withholdings on performance units and restricted stock units earned			(1,283)				(1,283)
Proceeds from preferred stock issuance, net of costs	110,927						110,927
Stock-based compensation expense			4,536				4,536
Balance at Dec. 31, 2021	$ 110,927	$ 586,946	$ 27,246	$ 440,169	$ (39,672)	$ (1,404)	$ 1,124,212