CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income		$ 55,108	$ 56,682
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		(2,100)	(2,000)
Depreciation of premises and equipment		2,554	2,549
Net amortization of premiums and discounts on securities and loans		2,485	2,742
Amortization of intangibles		648	674
Share-based compensation		2,589	2,705
Tax benefit (expense) from stock option exercises and other equity awards		71	135
Income from bank-owned life insurance	[1]	(1,900)	(1,781)
Net gains on loan sales, including changes in fair value		(6,164)	(24,093)
Proceeds from sales of loans, net		262,907	706,253
Loans originated for sale		(242,153)	(634,451)
(Increase) decrease in operating lease right-of-use assets		(1,096)	2,003
Increase (decrease) in operating lease liabilities		1,179	(1,907)
(Increase) decrease in other assets		(27,734)	34,107
Increase (decrease) in other liabilities		25,451	(36,698)
Net cash provided by (used in) operating activities		71,845	106,920
Cash flows from investing activities:
Purchases of mortgage-backed securities available for sale		(203,826)	(297,810)
Purchases of other debt securities available for sale		(10,747)	(221,166)
Maturities, calls and principal payments of mortgage-backed securities available for sale		97,495	274,169
Maturities, calls and principal payments of other debt securities available for sale		0	70,500
Net redemption (purchases) of Federal Home Loan Bank stock		(19,909)	15,191
Purchases of other equity investments		(375)	0
Net (increase) decrease in loans		(571,950)	(80,021)
Purchases of loans		(1,764)	(41,546)
Purchases of premises and equipment		(3,824)	(2,166)
Purchases of bank-owned life insurance		(7,000)	(7,000)
Equity investment in real estate limited partnership		(1,861)	0
Net cash provided by (used in) investing activities		(723,761)	(289,849)
Cash flows from financing activities:
Net increase (decrease) in deposits		89,806	679,789
Proceeds from Federal Home Loan Bank advances		1,946,112	1,173,000
Repayment of Federal Home Loan Bank advances		(1,391,112)	(1,544,267)
Treasury stock purchased		(9,479)	0
Net proceeds from stock option exercises and issuance of other equity awards, net of awards surrendered		(723)	(165)
Cash dividends paid		(28,342)	(27,308)
Net cash provided by (used in) financing activities		606,262	281,049
Net increase (decrease) in cash and cash equivalents		(45,654)	98,120
Cash and cash equivalents at beginning of period		178,493	202,268
Cash and cash equivalents at end of period		132,839	300,388
Noncash Activities:
Loans charged off		122	630
Commitment for equity investment in real estate limited partnership		8,360	0
Supplemental Disclosures:
Interest payments		15,677	14,675
Income tax payments		$ 13,021	$ 15,551

[1] As reported in the Unaudited Consolidated Statements of Income.