CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
OPERATING ACTIVITIES:
Net income	$ 74,324	$ 62,581
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation	10,153	9,219
Deferred income and expense, net of amortization	(1,513)	419
Amortization of core deposit intangibles	4,790	5,339
Gain on sale of securities	(230)	(531)
Net change in valuation of financial instruments carried at fair value	1,831	1,472
Purchases of securities—trading	0	(1,725)
Proceeds from sales of securities—trading	0	1,682
Principal repayments and maturities of securities—trading	1,618	3,527
Decrease in deferred taxes	(8,361)	(10,747)
Increase in current taxes payable	2,853	2,108
Equity-based compensation	3,045	3,129
Increase in cash surrender value of BOLI	(3,046)	(3,628)
Gain on sale of loans, net of capitalized servicing rights	(11,653)	(14,583)
Gain on disposal of real estate held for sale and property and equipment	(2,438)	(748)
Provision for loan losses	6,000	4,000
Provision for losses on real estate held for sale	256	804
Origination of loans held for sale	(626,677)	(753,714)
Proceeds from sales of loans held for sale	812,778	691,355
Net change in:
Other assets	(4,082)	(20,428)
Other liabilities	(144)	13,560
Net cash provided from operating activities	276,226	14,585
INVESTING ACTIVITIES:
Purchases of securities—available-for-sale	(706,911)	(242,222)
Principal repayments and maturities of securities—available-for-sale	135,163	143,244
Proceeds from sales of securities—available-for-sale	35,559	233,252
Purchases of securities—held-to-maturity	(5,105)	(60,344)
Principal repayments and maturities of securities—held-to-maturity	6,544	7,458
Loan originations, net of principal repayments	(120,116)	(34,328)
Purchases of loans and participating interest in loans	(266,481)	(230,778)
Proceeds from sales of other loans	73,366	193,939
Purchases of property and equipment	(7,641)	(9,223)
Proceeds from sale of real estate held for sale and sale of other property, net	15,873	8,021
Proceeds from FHLB stock repurchase program	80,056	70,237
Purchase of FHLB stock	(88,404)	(67,006)
Other	327	1,922
Net cash (used in) provided from investing activities	(847,770)	14,172
FINANCING ACTIVITIES:
Increase in deposits, net	417,436	56,904
Proceeds from long-term Federal Home Loan Bank Advances	150,000	0
Repayments of long-term Federal Home Loan Bank Advances	(7)	(70,007)
Proceeds from (repayments of) overnight and short term FHLB advances, net	59,000	(600)
(Decrease) increase in other borrowings, net	(1,971)	10,586
Cash dividends paid	(57,467)	(20,542)
Payments for Repurchase of Common Stock	1,400	21,098
Net cash provided from (used in) financing activities	565,591	(44,757)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(5,953)	(16,000)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	247,719	261,917
CASH AND CASH EQUIVALENTS, END OF PERIOD	241,766	245,917
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid in cash	13,406	12,781
Taxes paid, net of refunds received in cash	25,599	23,751
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	10	758
Dividends Payable	$ 8,443	$ 7,873