Statement of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 49,821	$ 39,358
Proceeds from Sale of Loans Held-for-sale	72,229	104,175
Originations of loans held for sale	(65,788)	(95,384)
Items not requiring (providing) cash:
Depreciation	6,842	6,901
Amortization	1,837	2,064
Compensation expense for stock option grants	539	412
Provision for loan losses	5,200	7,150
Net gains on loan sales	(1,438)	(2,343)
Net realized gains on sales of available-for-sale securities	(2)	0
Net losses on sale of premises and equipment	122	183
Net (gains) losses on sale/write-down of other real estate owned	2,003	211
Gain realized on sale of business units	(7,414)	0
Gain realized on termination of loss sharing agreements	0	(7,704)
Accretion of deferred income, premiums, discounts and other	(2,032)	(1,492)
(Gain) loss on derivative interest rate products	(53)	5
Deferred income taxes	(6,278)	(3,686)
Changes In:
Interest receivable	(670)	669
Prepaid expenses and other assets	5,967	(271)
Accrued expenses and other liabilities	1,331	787
Income taxes refundable/payable	11,158	841
Cash paid for sale of business units	(50,356)	0
Proceeds from sales of available-for-sale securities	502	0
Net cash provided by operating activities	73,374	51,876
CASH FLOWS FROM INVESTING ACTIVITIES
Net change in loans	(171,672)	136,205
Purchase of loans	(57,382)	(203,294)
Cash Received from FDIC Loss Sharing Reimbursements	0	16,245
Purchase of premises and equipment	(7,833)	(4,546)
Proceeds from sale of premises and equipment	2,296	521
Proceeds from sale of other real estate owned and repossessions	16,124	22,788
Capitalized costs on other real estate owned	(153)	(117)
Proceeds from maturities and calls of held-to-maturity securities	130	117
Proceeds from maturities and calls of available-for-sale securities	2,366	9,579
Principal reductions on mortgage-backed securities	17,134	19,834
Purchase of available-for-sale securities	(36,677)	0
Purchase of Federal Home Loan Bank stock	(3,736)	(248)
Net cash used in investing activities	(289,257)	(2,916)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in certificates of deposit	84,177	(121,438)
Net increase (decrease) in checking and savings deposits	(24,535)	42,563
Proceeds from Federal Home Loan Bank advances	2,363,500	889,000
Repayments of Federal Home Loan Bank advances	(2,251,000)	(746,435)
Net increase (decrease) in short-term borrowings	16,409	(132,424)
Advances from borrowers for taxes and insurance	3,539	4,182
Dividends paid	(11,288)	(9,523)
Stock options exercised	1,649	2,018
Net cash provided by (used in) financing activities	182,451	(72,057)
DECREASES IN CASH AND CASH EQUIVALENTS	(33,432)	(23,097)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	242,253	279,769
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 208,821	$ 256,672