Consolidated Condensed Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating Activities
Net income	$ 76,912,000	$ 100,741,000
Items not requiring (providing) cash:
Provision (benefit) for credit losses	11,513,000	(9,061,000)
Depreciation	4,264,000	4,837,000
Amortization of premium and discounts on loans, securities, deposits and debt obligations	6,920,000	48,000
Amortization of mortgage servicing rights, net of impairment charges/recoveries	2,504,000	464,000
Amortization of intangibles	4,156,000	4,725,000
Change in deferred taxes	(774,000)	1,708,000
Proceeds from the sale of loans held for sale	264,253,000	681,946,000
Originations of loans held for sale	(227,175,000)	(631,573,000)
Mortgage banking gain, net	(7,072,000)	(13,663,000)
Loss (gain) on sale / write-down of real estate and other assets held for sale	(78,000)	10,000
Loss (gain) on sale of available for sale securities	0	(2,218,000)
Loss (gain) on equity securities	1,760,000	(822,000)
Shares issued under stock option plan	53,000	0
Stock based compensation expense	1,628,000	2,383,000
Restricted stock forfeitures for taxes and option exercises	(334,000)	(678,000)
Income from bank owned life insurance	(2,961,000)	(2,975,000)
Changes in:
Accrued interest receivable and other assets	(62,582,000)	(11,908,000)
Other liabilities	45,332,000	(10,957,000)
Net cash provided (used) by operating activities	118,319,000	113,007,000
Investing Activities
Proceeds from maturities, calls and pay-downs of available-for-sale securities	76,837,000	109,756,000
Proceeds from sale of available-for-sale securities	0	158,011,000
Proceeds from sale of premises and equipment, real estate and other assets held for sale	475,000	290,000
Purchases of available-for-sale securities	(122,458,000)	(803,082,000)
Purchases of equity securities	(2,999,000)	(11,053,000)
Net change in Federal Home Loan Bank stock	(16,677,000)	4,441,000
Purchases of premises and equipment, net	(2,409,000)	(2,025,000)
Proceeds from bank owned life insurance	0	893,000
Purchase of bank owned life insurance	0	(20,000,000)
Net (increase) decrease in loans receivable	(919,634,000)	226,637,000
Net cash used in investing activities	(986,865,000)	(336,132,000)
Financing Activities
Net increase in deposits and advance payments by borrowers	459,964,000	199,599,000
Net change in Federal Home Loan Bank advances	411,000,000	0
Net change in notes payable	0	18,812,000
Net cash paid for repurchase of common stock	(26,868,000)	(10,821,000)
Cash dividends paid on common stock	(32,124,000)	(28,637,000)
Net cash provided by financing activities	811,972,000	178,953,000
Increase (decrease) in cash and cash equivalents	(56,574,000)	(44,172,000)
Cash and cash equivalents at beginning of period	161,566,000	159,266,000
Cash and cash equivalents at end of period	104,992,000	115,094,000
Supplemental cash flow information:
Interest paid	16,529,000	13,086,000
Income taxes paid	12,320,000	23,858,000
Initial recognition of right-of-use asset	643,000	500,000
Initial recognition of lease liability	643,000	500,000
Transfers from loans to real estate and other assets held for sale	$ 0	$ 438,000