Consolidated Statement of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,162	$ 5,985
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Amortization and accretion of premiums and discounts on securities, net	566	1,206
Accretion of loan discounts, net	(282)	(240)
Amortization of deposit premiums	(170)	(307)
Amortization of core deposit intangibles	122	123
Provision for loan losses	1,223	1,127
Depreciation	707	674
Net gain on sale of real estate acquired by foreclosure	(139)	(59)
Writedown of real estate acquired by foreclosure	141
Net gain on sale of guaranteed portion of loans	(1,223)	(792)
Stock-based compensation expense	97	172
Decrease (increase) in accrued interest receivable and other assets, net	(29)	(664)
Increase in accrued interest payable and other liabilities, net	(8)	(946)
Net cash provided by operating activities	9,167	6,279
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the maturities or calls and paydowns of available-for-sale securities	21,144	28,535
Purchases of available-for-sale securities	(20,080)	(34,774)
Proceeds from the maturities or calls and paydowns of held-to-maturity securities	4,511	5,684
Purchases of held-to-maturity securities	(1,988)	(8,988)
Proceeds from sale of guaranteed portion of loans	14,682	8,572
Proceeds from sale of real estate acquired by foreclosure	1,825	628
Net increase in Federal Home Loan Bank of Dallas stock	(1,131)	(67)
Net increase in Federal Reserve Bank stock	(4)	(5)
Net increase in loans held for investment	(89,343)	(66,564)
Investment in construction of premises and purchases of other fixed assets	(668)	(972)
Net cash used in investing activities	(71,052)	(67,951)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in deposit accounts	87,370	23,112
Net increase (decrease) in securities sold under agreements to repurchase	3,034	(2,179)
Net proceeds from other short-term borrowed funds	5,000
Repayment of other long-term borrowed funds	(23)	(262)
Proceeds from issuance of common stock due to exercise of stock options	76
Net cash provided by (used in) financing activities	95,457	20,671
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	33,572	(41,001)
CASH AND CASH EQUIVALENTS:
Beginning of year	34,757	178,492
End of period	68,329	137,491
SUPPLEMENTAL INFORMATION:
Interest paid	4,914	5,721
Income taxes paid	3,050	3,616
Noncash investing and financing activities - acquisition of real estate through foreclosure of collateral		$ 1,961