Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Cash Flows From Operating Activities:
Net income		$ 42,384	$ 42,606
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion		7,564	5,260
Provision for credit losses		9,000	900
Increase in cash surrender value of life insurance		(1,647)	(1,432)
Stock-based compensation expense		4,216	3,643
Asset (gains) losses, net		1,185	(8,030)
Gain on sale of loans held for sale, net		(22,217)	(7,042)
Proceeds from sale of loans held for sale		663,466	255,775
Origination of loans held for sale		(650,660)	(259,465)
Net change in:
Accrued interest receivable and other assets		4,781	(5,020)
Accrued interest payable and other liabilities		6,200	9,310
Net cash provided by (used in) operating activities		64,272	36,505
Cash Flows From Investing Activities:
Net (increase) decrease in loans		(244,751)	(74,131)
Net (increase) decrease in certificates of deposit in other banks		5,719	(4,402)
Purchases of securities AFS		(128,661)	(57,875)
Proceeds from sales of securities AFS		14,864	13,240
Proceeds from calls and maturities of securities AFS		69,568	38,128
Purchases of other investments		(3,815)	(1,941)
Proceeds from sales of other investments		0	17,144
Purchases of BOLI		0	(5,000)
Proceeds from redemption of BOLI		245	1,348
Net (increase) decrease in premises and equipment		(9,708)	(3,529)
Net (increase) decrease in other real estate and other assets		0	15
Net cash (paid) received in business combination		(21,820)	0
Net cash provided by (used in) investing activities		(318,359)	(77,003)
Cash Flows From Financing Activities:
Net increase (decrease) in deposits		617,373	(29,691)
Proceeds from long-term borrowings		367,841	0
Repayments of long-term borrowings		(32,029)	(20,193)
Purchase and retirement of common stock		(28,947)	(19,731)
Proceeds from issuance of common stock		482	449
Proceeds from exercise of stock options		1,048	4,382
Distribution to noncontrolling interest		(176)	(275)
Net cash provided by (used in) financing activities		925,592	(65,059)
Net increase (decrease) in cash and cash equivalents		671,505	(105,557)
Cash and cash equivalents:
Beginning		182,059	249,526
Ending	[1]	853,564	143,969
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest		18,130	16,682
Cash paid for taxes		16,353	11,690
Transfer of loans and bank premises to other real estate owned		0	1,025
Capitalized mortgage servicing rights		$ 4,038	$ 1,807

[1] Cash and cash equivalents at September 30, 2020 include restricted cash of $1.9 million pledged as collateral on interest rate swaps and no reserve balance was required with the Federal Reserve Bank. At September 30, 2019, cash and cash equivalents include restricted cash of $1.3 million pledged as collateral on interest rate swaps and $6.3 million for the reserve balance required with the Federal Reserve Bank.