CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 201,608	$ 66,956	$ 93,229
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,026	16,424	17,649
Amortization of intangible assets	3,593	4,403	4,896
Provision for loan and lease losses	59,253	144,254	86,733
Deferred income tax (benefit) expense	(25,043)	(13,152)	23,879
Stock-based compensation	5,825	7,296	6,876
Loss (gain) on sale of investments	34	(371)	(6,104)
OTTI on debt securities	50	12,231	6,687
Gain from recovery of investments previously written off	0	0	(1,547)
Unrealized (gain) loss on derivative instruments	(46)	(187)	78
Gain on extinguishment of debt	(2,316)	(1,391)	(4,217)
Net gain on sales of premises and equipment and other assets	(1,366)	(149)	(700)
Gain fom insurance proceeds	(537)	0	0
Net gain on sale of loans	(2,639)	(6,291)	(10,273)
Net amortization/accretion of premiums, discounts, and deferred loan fees and costs	(8,397)	(8,757)	(8,819)
Originations and purchases of loans held for sale	(319,770)	(316,258)	(488,833)
Sales and repayments of loans held for sale	344,935	329,554	493,821
Amortization of broker placement fees	1,163	1,900	2,881
Net amortization/accretion of premiums and discounts on investment securities	2,407	2,764	6,890
Decrease (increase) in accrued interest receivable	6,649	(12,755)	2,934
Decrease (increase) in other assets	8,906	(202)	17,716
Increase (decrease) in accrued interest payable	236	1,390	(29,200)
(Decrease) increase in other liabilities	(1,248)	8,305	(15,144)
Net cash provided by operating activities	288,323	235,964	199,432
Cash flows from investing activities:
Principal collected on loans	2,722,311	2,504,629	2,830,830
Loans originated and purchased	(3,000,174)	(2,655,401)	(2,813,253)
Proceeds from sale of loans held for investment	82,526	53,245	31,852
Proceeds from sale of repossessed assets	51,799	35,239	56,369
Proceeds from sale of available-for-sale securities	47,805	23,408	219,780
Purchases of available-for-sale securities	(509,884)	(265,415)	(619,636)
Proceeds from principal repayments and maturities of securities available for sale	387,817	232,977	390,286
Proceeds from principal repayments of held-to-maturity securities	5,828	5,563	5,293
Proceeds From Recovery Of Investments Previously Written Off	0	0	1,547
Additions to premises and equipment	(20,514)	(9,417)	(10,370)
Proceeds from sale of premises and equipment and other assets	2,548	2,043	2,279
Net purchases/sales of other investment securities	(993)	(127)	(10,823)
Proceeds from the settlement of insurance claims	7,673	0	0
Net cash outflows from purchase/sale of insurance contracts	0	0	(960)
Net cash (used in) provided by investing activities	(223,258)	(73,256)	83,194
Cash flows from financing activities:
Net (decrease) increase in deposits	(36,889)	220,105	(542,019)
Change in securities sold under agreements to repurchase	(149,914)	0	(400,000)
Net FHLB advances proceeds	25,000	45,000	215,000
Repayments of junior subordinated debentures	(21,434)	(5,930)	(7,025)
Repurchase of outstanding common stock	(2,827)	(2,497)	(1,132)
Dividends paid on common stock	(6,517)	0	0
Dividends paid preferred stock	(2,676)	(2,676)	(223)
Net cash provided by (used in) financing activities	(195,257)	254,002	(735,399)
Net (decrease) increase in cash and cash equivalents	(130,192)	416,710	(452,773)
Cash and cash equivalents at beginning of year	716,395	299,685	752,458
Cash and cash equivalents at end of year	586,203	716,395	299,685
Cash and cash equivalents include:
Cash and Cash Equivalents, at Carrying Value, Total	$ 716,395	$ 716,395	$ 752,458