CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
OPERATING ACTIVITIES:
Net income	$ 16,882	$ 33,655	$ 33,346
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation	4,614		4,481
Deferred income and expense, net of amortization	(1,129)		(895)
Amortization of core deposit intangibles	2,001		2,052
Gain on sale of securities	(78)		(1)
Net change in valuation of financial instruments carried at fair value	4,596		(11)
Decrease in deferred taxes, net	(16,507)		(5,379)
Increase in current taxes payable	2,067		7,243
Stock-based compensation	1,872		1,219
Increase in cash surrender value of BOLI	(1,041)		(1,267)
Gain on sale of loans, including capitalized servicing rights	(8,363)		(2,063)
Loss on disposal of real estate held for sale and property and equipment	444		371
Provision for credit losses	21,713		2,000
Provision for Other Credit Losses	1,722		0
Provision for losses on real estate held for sale	21,748		2,000
Origination of loans held for sale	(296,712)		(134,747)
Proceeds from sales of loans held for sale	333,094		261,978
Net change in:
Other assets	(51,061)		(1,472)
Other liabilities	5,400		(12,847)
Net cash provided from operating activities	52,563		164,766
INVESTING ACTIVITIES:
Purchases of securities—available-for-sale	(143,973)		(5,140)
Principal repayments and maturities of securities—available-for-sale	82,760		51,910
Proceeds from sales of securities—available-for-sale	44,509		516
Purchases of securities—held-to-maturity	(206,155)		0
Principal repayments and maturities of securities—held-to-maturity	3,786		14,744
Loan originations, net of principal repayments	16,646		(8,988)
Proceeds from sales of other loans	5,751		3,186
Purchases of property and equipment	(3,086)		(3,947)
Proceeds from sale of real estate held for sale and sale of other property, net	877		876
Proceeds from FHLB stock repurchase program	47,840		52,372
Purchase of FHLB stock	(39,745)		(47,480)
Other	(72)		485
Net cash (used in) provided from investing activities	(190,862)		58,534
FINANCING ACTIVITIES:
Increase (decrease) in deposits, net	400,895		(100,819)
Proceeds from FHLBank Advance, Investing Activities	0		300,000
Repayments of long-term Federal Home Loan Bank Advances	0		(189)
Repayment of overnight and short term FHLB advances, net	(203,000)		(422,000)
Increase in other borrowings, net	10,289		2,724
Cash dividends paid	(50,505)		(13,405)
Taxes paid related to net share settlement of equity awards	339		269
Payments for Repurchase of Common Stock	31,775		0
Net cash provided from (used in) financing activities	125,565		(233,958)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(12,734)		(10,658)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	307,735		272,196
CASH AND CASH EQUIVALENTS, END OF PERIOD	295,001	307,735	261,538
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid in cash	13,014		13,812
Tax refunds received	(29)		(71)
NON-CASH INVESTING AND FINANCING TRANSACTIONS:
Loans, net of discounts, specific loss allowances and unearned income, transferred to real estate owned and other repossessed assets	1,588		$ 0
Dividends Payable	$ 15,277	$ 14,863