CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES:
Net income	$ 61,214	$ 49,247
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation	7,253	6,484
Deferred income and expense, net of amortization	(1,518)	(1,401)
Amortization of core deposit intangibles	2,764	3,248
(Gain) loss on sale of securities	(48)	41
Net change in valuation of financial instruments carried at fair value	(3,532)	1,338
Principal repayments and maturities of securities—trading	0	17
Gain (Loss) on Sale of Assets and Asset Impairment Charges	249	0
(Increase) decrease in deferred taxes	6,510	(6,564)
Increase in current taxes payable	5,603	2,407
Stock-based compensation	3,231	2,666
Increase in cash surrender value of BOLI	(1,768)	(2,012)
Gain on sale of loans, net of capitalized servicing rights	(6,533)	(10,975)
Gain on disposal of real estate held for sale and property and equipment	(1,858)	(2,226)
Provision for loan losses	4,000	4,000
Provision for losses on real estate held for sale	160	256
Origination of loans held for sale	(415,790)	(394,585)
Proceeds from sales of loans held for sale	384,215	585,749
Net change in:
Other assets	1,734	(4,863)
Other liabilities	1,797	(3,338)
Net cash provided from operating activities	34,165	242,617
INVESTING ACTIVITIES:
Purchases of securities—available-for-sale	(591,265)	(580,321)
Principal repayments and maturities of securities—available-for-sale	69,853	80,149
Proceeds from sales of securities—available-for-sale	8,363	15,647
Purchases of securities—held-to-maturity	(8,469)	(4,605)
Principal repayments and maturities of securities—held-to-maturity	4,422	3,317
Loan originations, net of principal repayments	(82,461)	(32,266)
Purchases of loans and participating interest in loans	(2,268)	(64,618)
Proceeds from sales of other loans	4,733	3,950
Proceeds from Sales of Assets, Investing Activities	(20,412)	0
Purchases of property and equipment	(9,925)	(5,356)
Proceeds from sale of real estate held for sale and sale of other property, net	6,367	14,912
Proceeds from FHLB stock repurchase program	79,878	53,156
Purchase of FHLB stock	(89,460)	(52,984)
Other	417	298
Net cash used in investing activities	(630,227)	(568,721)
FINANCING ACTIVITIES:
Increase in deposits, net	364,890	362,317
Repayments of long-term Federal Home Loan Bank Advances	(5)	(4)
Proceeds from (repayments of) overnight and short term FHLB advances, net	239,000	(4,000)
Increase in other borrowings, net	16,598	10,770
Cash dividends paid	(19,494)	(15,963)
Taxes paid related to net share settlement of equity awards	1,343	1,187
Payments for Repurchase of Common Stock	15,359	0
Net cash provided from financing activities	584,287	351,933
NET CHANGE IN CASH AND CASH EQUIVALENTS	(11,775)	25,829
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	261,200	247,719
CASH AND CASH EQUIVALENTS, END OF PERIOD	249,425	273,548
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid in cash	11,720	8,464
Taxes paid, net	8,806	17,106
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	1,419	10
Dividends Payable	$ 27,833	$ 41,733