CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 23,344	$ 25,646
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	4,588	5,306
Amortization and impairment of intangible assets	1,214	1,093
Provision for loan and lease losses	21,053	32,970
Deferred income tax (benefit) expense	3,635	2,060
Stock-based compensation	1,557	1,457
Gain on sales of investments, net	(8)	0
Loss on early extinguishment of borrowings	(4,217)	0
Other-than-temporary impairments on debt securities	6,687	156
Derivative instruments and financial liabilities measured at fair value, gain	153	72
Loss (gain) on sale of premises and equipment and other assets	0	194
Net gain on sale of loans held for investment	(2,488)	(1,689)
Net amortization of premiums, discounts and deferred loan fees and costs	(2,343)	(673)
Originations and purchases of loans held for sale	(107,034)	(89,425)
Sales and repayments of loans held for sale	108,615	87,051
Amortization of broker placement fees	858	1,335
Net amortization of premium and discounts on investment securities	447	1,269
(Increase) decrease in accrued interest receivable	3,806	1,953
Decrease in accrued interest payable	2,257	1,000
Decrease (increase) in other assets	3,320	8,562
Increase (decrease) in other liabilities	(11,167)	11,007
Business Combination Bargain Purchase Gain Recognized Amount	0	(13,443)
Net cash provided by operating activities	54,277	75,513
Cash flows from investing activities:
Principal collected on loans	735,801	751,062
Loans originated and purchased	(627,105)	(705,621)
Proceeds from sale of loans held for investment	0	2,230
Proceeds from sale of repossessed assets	12,375	18,446
Proceeds from sale of available-for-sale securities	14,990	0
Purchases of securities available for sale	(62,770)	(56,429)
Proceeds from principal repayments and maturities of securities available for sale	62,418	53,596
Additions to premises and equipment	(3,006)	(3,027)
Proceeds from sale of premises and equipment and other assets	0	2,492
Cash Acquired From Acquisition	0	217,659
Payments To Acquire Insurance Contracts	(1,067)	0
(Increase) decrease in other equity securities	(141)	(433)
Net cash provided by investing activities	131,495	279,975
Cash flows from financing activities:
Net decrease in deposits	95,879	(166,924)
Repurchase of outstanding common stock	(259)	(236)
Repayments Of Other Debt	(7,025)	0
Net cash provided (used in) financing activities	88,595	(167,160)
Net increase in cash and cash equivalents	274,367	188,328
Cash and cash equivalents at beginning of period	752,458	796,108	$ 796,108
Cash and cash equivalents at end of period	1,026,825	984,436	752,458
Cash and cash equivalents include:
Cash and due from banks				$ 813,732		$ 767,471
Money market instruments				213,093	$ 219,473	216,965
Cash and Cash Equivalents, at Carrying Value, Total	$ 752,458	$ 796,108	$ 752,458	$ 1,026,825	$ 752,458	$ 984,436