Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2019	$ 315	$ 226,691	$ (71,487)	$ 433,960	$ (9,807)	$ 579,672
Adoption of ASC 326- Credit Losses	0	0	0	(875)	0	(875)
Net income	0	0	0	34,674	0	34,674
Shares issued in acquisition of Empire Bancorp, Inc.	26	32,679	0	0	0	32,705
Award of shares released from Employee Benefit Trust	0	1,520	0	0	0	1,520
Vesting of restricted stock unit awards	0	(5,807)	5,964	(157)	0
Stock-based compensation expense	0	6,450	0	0	0	6,450
Purchase of treasury shares	0	0	(2,342)	0	0	(2,342)
Repurchase of shares to satisfy tax obligation	0	0	(1,535)	0	0	(1,535)
Dividends on common stock	0	0	0	(24,813)	0	(24,813)
Other comprehensive income (loss), net of tax	0	0	0	0	(6,459)	(6,459)
Balance at Dec. 31, 2020	341	261,533	(69,400)	442,789	(16,266)	618,997
Net income	0	0	0	81,793	0	81,793
Award of shares released from Employee Benefit Trust	0	321	0	0	0	321
Vesting of restricted stock unit awards	0	(5,308)	5,477	(169)	0
Stock-based compensation expense	0	6,829	0	0	0	6,829
Purchase of treasury shares	0	0	(9,988)	0	0	(9,988)
Repurchase of shares to satisfy tax obligation	0	0	(1,382)	0	0	(1,382)
Dividends on common stock	0	0	0	(26,524)	0	(26,524)
Other comprehensive income (loss), net of tax	0	0	0	0	9,582	9,582
Balance at Dec. 31, 2021	341	263,375	(75,293)	497,889	(6,684)	679,628
Net income	0	0	0	76,945	0	76,945
Award of shares released from Employee Benefit Trust	0	287	0	0	0	287
Vesting of restricted stock unit awards	0	(6,137)	6,433	(296)	0
Stock-based compensation expense	0	6,807	0	0	0	6,807
Purchase of treasury shares	0	0	(27,246)	0	0	(27,246)
Repurchase of shares to satisfy tax obligation	0	0	(2,429)	0	0	(2,429)
Dividends on common stock	0	0	0	(27,031)	0	(27,031)
Other comprehensive income (loss), net of tax	0	0	0	0	(29,804)	(29,804)
Balance at Dec. 31, 2022	$ 341	$ 264,332	$ (98,535)	$ 547,507	$ (36,488)	$ 677,157