Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income	$ 35,049,000	$ 36,143,000
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Provision (recapture) for credit losses	1,573,000	(9,566,000)
Depreciation expense	2,520,000	2,602,000
Amortization of intangibles	518,000	559,000
Amortization of premiums on securities	480,000	1,181,000
Amortization of lease right-to-use assets	1,008,000	1,141,000
Accretion of lease liabilities	260,000	294,000
Earnings on bank-owned life insurance	(1,118,000)	(3,103,000)
Stock-based compensation expense	1,537,000	1,813,000
Deferred income tax provision	(76,000)	2,094,000
Net gain on sales of assets	(673,000)	(918,000)
Net loss on securities	128,000	12,000
Change in operating assets and liabilities:
Loans held for sale	539,000	3,191,000
Other assets	(4,451,000)	8,061,000
Other liabilities	2,429,000	11,476,000
Total adjustments	4,674,000	18,837,000
Net cash provided by operating activities	39,723,000	54,980,000
Cash flows from investing activities:
Purchases of securities	(662,554,000)	(630,233,000)
Proceeds from sales, calls and maturities of securities	451,400,000	453,260,000
Principal repayments of securities	32,066,000	48,029,000
Net increase in loans	(204,893,000)
Net decrease in loans		312,736,000
Net (purchases) sales of loan participations	(56,596,000)	(208,000)
Proceeds from sales of Small Business Administration loans	2,802,000	3,719,000
Net return of capital from equity investments	1,302,000	1,303,000
Redemptions of bank-owned life insurance		2,670,000
Net purchases of premises and equipment	(857,000)	(710,000)
Proceeds from sales of repossessed real estate and other assets		112,000
Net cash (used in) provided by investing activities	(437,330,000)	190,678,000
Cash flows from financing activities:
Net (decrease) increase in noninterest-bearing deposits	(4,508,000)	151,719,000
Net (decrease) increase in interest-bearing deposits	(103,002,000)	78,122,000
Repayment of Federal Home Loan advances	(50,000,000)
Dividends paid on common stock	(9,578,000)	(8,833,000)
Payments to tax authorities for stock-based compensation	(135,000)	(87,000)
Proceeds from exercise of stock options	173,000	24,000
Repurchase of common stock	(15,041,000)	(5,825,000)
Net cash (used) provided by financing activities	(182,091,000)	215,120,000
Net increase (decrease) in cash, cash equivalents and restricted cash	(579,698,000)	460,778,000
Cash, cash equivalents and restricted cash, beginning	950,146,000	538,007,000
Cash, cash equivalents and restricted cash, ending	$ 370,448,000	$ 998,785,000