CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 75,090	$ 66,336	$ 58,734
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	6,450	1,910	4,500
Depreciation and amortization	2,428	2,632	2,769
Net amortization of securities premiums and discounts	376	1,446	1,159
Increase in cash surrender value of BOLI	(2,233)	(2,175)	(2,088)
Decrease /(increase) in deferred income taxes, net	4,330	(880)	(1,962)
Loss/(gains) on sale of securities available-for-sale	10,689	(2,554)	(40)
Net changes in:
Other assets	(8,262)	(12,432)	(818)
Other liabilities	12,910	5,680	(4,135)
Net cash provided by operating activities	101,778	59,963	58,119
Cash flows from investing activities:
Net change in loans held for investment	(275,061)	(137,216)	(427,049)
Purchase of available-for-sale securities	(10,217)	(257,231)	(670,550)
Purchase of held-to-maturity securities	(173,907)	(395,176)	(22,020)
Purchase of non-marketable securities	0	(2,856)	0
Proceeds from sales, maturities, calls and pay downs of available-for-sale securities	88,504	458,855	383,257
Proceeds from maturities, calls and pay downs of held-to-maturity securities	65,493	43,287	13,299
Purchase of premises and equipment	(4,190)	(2,069)	(7,709)
Purchase of other investments	(6,600)	(8,192)	(6,063)
Redemption of other investments	0	2,752	0
Proceeds from bank-owned life insurance	606	0	0
Proceeds from sale of assets	73	1,696	81
Net cash used in investing activities	(315,299)	(296,150)	(736,754)
Cash flows from financing activities:
Net increase in deposits	119,117	579,885	782,248
Cash dividends paid	(12,489)	(12,075)	(11,700)
Net cash used in share repurchase of common stock	(20,310)	0	(2,834)
Net provided by financing activities	86,318	567,810	767,714
Net change in cash and cash equivalents	(127,203)	331,623	89,079
Cash and cash equivalents, beginning of year	715,460	383,837	294,758
Cash and cash equivalents, end of year	588,257	715,460	383,837
Supplemental disclosures of cash flow information:
Cash paid for interest	5,785	4,369	10,903
Income taxes paid	12,469	29,941	9,581
Issuance of common stock	0	0	403
Supplemental disclosures of non-cash transactions:
Investment securities available-for-sale transferred to held-to-maturity	0	316,925	0
Unrealized (losses)/gains on securities available for sale	28,326	20,540	(13,865)
Lease liabilities arising from obtaining right-of-use assets	$ 0	$ 295	$ 0