Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 27,771	$ 21,206
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,510	1,681
Provision for loan losses	832	3,398
Deferred income taxes	1,937	6,458
Net amortization of debt securities	2,473	2,885
Amortization of intangible assets	842	965
Gain on sale of investment securities	(23)	0
Mortgage loans originated for sale	(95,744)	(52,475)
Proceeds from mortgage loans sold	95,814	49,811
Gain on sale of other real estate	(61)	(1,514)
Gain on state tax credits, net	(1,069)	(860)
Excess tax benefit of share-based compensation	(156)	(101)
Share-based compensation	2,588	2,205
Valuation adjustment on other real estate	82	618
Net accretion of loan discount and indemnification asset	(4,894)	731
Changes in:
Accrued interest receivable	(703)	(223)
Accrued interest payable	(63)	(103)
Other assets	4,851	(2,984)
Other liabilities	4,024	(1,381)
Net cash provided by operating activities	40,011	30,317
Cash flows from investing activities:
Net increase in loans	(152,970)	(133,782)
Net cash proceeds received from FDIC loss share receivable	1,725	6,487
Proceeds from the sale of securities, available for sale	41,069	0
Proceeds from the paydown or maturity of securities, available for sale	40,230	35,503
Proceeds from the paydown or maturity of securities, held to maturity	1,848	0
Proceeds from the redemption of other investments	29,362	18,637
Proceeds from the sale of state tax credits held for sale	5,353	4,099
Proceeds from the sale of other real estate	5,662	14,435
Payments for the purchase/origination of:
Securities, available for sale	(150,934)	(53,664)
Other investments	(23,931)	(21,324)
State tax credits held for sale	(14,004)	0
Fixed assets	(1,152)	(1,556)
Net cash used in investing activities	(217,742)	(131,165)
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	48,828	42,118
Net increase (decrease) in interest-bearing deposit accounts	273,625	(67,307)
Proceeds from Federal Home Loan Bank advances	635,900	799,600
Repayments of Federal Home Loan Bank advances	(704,900)	(729,600)
Repayments of notes payable	(900)	(4,500)
Net decrease in other borrowings	(44,299)	(22,709)
Cash dividends paid on common stock	(3,654)	(3,130)
Excess tax benefit of share-based compensation	156	101
Issuance of common stock, net	(831)	(482)
Net cash provided by financing activities	203,925	14,091
Net increase (decrease) in cash and cash equivalents	26,194	(86,757)
Cash and cash equivalents, beginning of period	100,696	210,569
Cash and cash equivalents, end of period	126,890	123,812
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	9,415	10,920
Cash paid during the period for income taxes	8,763	8,998
Noncash transactions:
Transfer to other real estate owned in settlement of loans	6,604	7,468
Sales of other real estate financed	0	5,102
Issuance of common stock from Trust Preferred Securities conversion	$ 0	$ 5,002