Consolidated Statement of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 7,212	$ 1,839
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Amortization and accretion of premiums and discounts on securities, net	111	209
Accretion of loan discounts, net	(1,217)	(2,546)
Amortization of deposit premiums	(349)	(1,092)
Amortization of core deposit intangibles	380	402
Accretion of borrowing valuation allowance	105	66
Amortization of issuance costs for subordinated notes	36
Provision for loan losses	6,145	16,000
Depreciation	533	641
Net loss (gain) on sale of real estate acquired by foreclosure	163	54
Net gain on sale of mortgage loans HFS	138	(41)
Net gain on sale of guaranteed portion of loans	(1,927)	(1,138)
Originations of loans held for sale		(1,094)
Proceeds from sales of and principal collected on loans held for sale	10,761	1,519
Stock-based compensation expense	535	305
Deferred tax benefit	(1,987)	(2,475)
Increase in accrued interest receivable and other assets, net	4,216	448
Increase in accrued interest payable and other liabilities, net	(2,218)	(784)
Net cash provided by operating activities	22,637	12,313
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the maturities or calls and paydowns of available-for-sale securities	15,765	13,931
Purchases of available-for-sale securities	(298,454)
Proceeds from the maturities or calls and paydowns of held-to-maturity securities	1,659	2,088
Proceeds from sale of guaranteed portion of loans	21,959	12,644
Proceeds from sale of real estate acquired by foreclosure	3,701	3,258
Purchases of Federal Home Loan Bank of Dallas stock, net of redemptions	(394)	(39)
Purchases of Federal Reserve Bank stock	(14)	(3,719)
Net increase in loans held for investment	57,027	(56,127)
Investment in construction of premises and purchases of other fixed assets	(193)	(157)
Net cash used in investing activities	(198,944)	(28,121)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in deposit accounts	41,787	(42,637)
Net increase (decrease) in securities sold under agreements to repurchase	823	471
Net proceeds of other short-term borrowed funds		121,000
Net repayment of other short-term borrowed funds		(15,258)
Proceeds from issuance of common stock due to exercise of stock options	271
Purchase of treasury stock		(1,253)
Net cash provided by (used in) financing activities	42,881	62,323
NET INCREASE IN CASH AND CASH EQUIVALENTS	(133,426)	46,515
CASH AND CASH EQUIVALENTS:
Beginning of year	389,007	124,906
End of year	255,581	171,421
NONCASH ACTIVITIES:
Noncash investing and financing activities - acquisition of real estate through foreclosure of collateral	5,270	420
Transfer of loans to held-for-sale	4,260
SUPPLEMENTAL INFORMATION:
Interest paid	$ 6,880	4,304
Income taxes paid		$ 500