CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 88,314	$ 75,090	$ 66,336
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	9,407	6,450	1,910
Depreciation and amortization	2,491	2,428	2,632
Net amortization of securities premiums and discounts	(109)	376	1,446
Increase in cash surrender value of BOLI	(2,027)	(2,233)	(2,175)
Gain on BOLI death benefit	(4,346)	0	0
(Increase)/decrease in deferred income taxes, net	(5,603)	4,330	(880)
Losses/(gains) on sale of securities available-for-sale	8,199	10,689	(2,554)
Net changes in:
Other assets	(16,792)	(8,262)	(12,432)
Other liabilities	13,814	12,910	5,680
Net cash provided by operating activities	93,348	101,778	59,963
Cash flows from investing activities:
Net change in loans and leases held-for-investment	(156,433)	(275,061)	(137,216)
Purchase of available-for-sale securities	(84,114)	(10,217)	(257,231)
Purchase of held-to-maturity securities	(6,850)	(173,907)	(395,176)
Purchase of non-marketable securities	0	0	(2,856)
Proceeds from sales, maturities, calls and pay downs of available-for-sale securities	59,557	88,504	458,855
Proceeds from maturities, calls and pay downs of held-to-maturity securities	49,063	65,493	43,287
Purchase of bank-owned life insurance	(7,271)	0	0
Purchase of premises and equipment	(4,972)	(4,190)	(2,069)
Purchase of other investments	(7,306)	(6,600)	(8,192)
Redemption of other investments	0	0	2,752
Proceeds from bank-owned life insurance	11,751	606	0
Proceeds from sale of assets	27	73	1,696
Net cash used in investing activities	(146,548)	(315,299)	(296,150)
Cash flows from financing activities:
Net (decrease)/increase in deposits	(91,174)	119,117	579,885
Cash dividends paid	(12,886)	(12,489)	(12,075)
Net cash used in share repurchase of common stock	(20,355)	(20,310)	0
Net cash used in/provided by financing activities	(124,415)	86,318	567,810
Net change in cash and cash equivalents	(177,615)	(127,203)	331,623
Cash and cash equivalents, beginning of period	588,257	715,460	383,837
Cash and cash equivalents, end of period	410,642	588,257	715,460
Supplemental disclosures of cash flow information:
Cash paid for interest	29,280	5,785	4,369
Income taxes paid	12,662	12,469	29,941
Supplemental disclosures of non-cash transactions:
Investment securities available-for-sale transferred to held-to-maturity	0	0	316,925
Net change in unrealized gains/(losses) on securities available-for-sale	(13,445)	28,326	20,540
Lease liabilities arising from obtaining right-of-use assets	$ 0	$ 0	$ 295