CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flow From Operating Activities:
Net income	$ 65,384	$ 60,162	$ 44,530
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	417	2,560	6,648
Depreciation and amortization	6,262	6,007	4,670
Change in deferred taxes	4,444	15,048	2,147
Share-based compensation	2,270	2,177	$ 1,773
Tax benefit from stock options exercised	(70)	(60)
Loans originated for sale	(364,411)	(222,892)	$ (280,693)
Proceeds from sales of Loans	361,752	$ 220,988	$ 297,851
Gain on sale of insurance subsidiary	(8,265)
Gain on cancellation of subordinated debentures	(1,250)
Gains on sales of securities available for sale	(2,670)	$ (3,581)	$ (487)
Change in interest receivable	(2,833)	(545)	(535)
Change in interest payable	$ (162)	$ 1,332	(364)
Change in other receivable			110,032
Other adjustments	$ (4,208)	$ (5,356)	(2,441)
Net cash provided by operating activities	56,660	75,840	183,131
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	24,917	24,075	196,753
Purchases of:
Securities available for sale	(200,154)	(110,936)	(398,491)
Securities held to maturity	(87,282)	(142,988)	(11,145)
Proceeds from sales of securities available for sale	83,647	126,575	25,222
Proceeds from maturities of:
Securities available for sale	63,124	68,339	93,273
Securities held to maturity	98,581	69,420	78,534
Change in Federal Reserve and Federal Home Loan Bank stock	7,268	(413)	(17)
Net change in loans	(350,287)	(170,109)	(142,861)
Net cash and cash equivalents received (paid) in acquisition	(7,936)	$ (10,084)	$ 10,992
Net cash received from sale of insurance subsidiary	15,155
Proceeds from the sale of other real estate owned	12,567	$ 14,241	$ 12,346
Other investing activities	9	5,889	(2,768)
Net cash used in investing activities	(340,391)	(125,991)	(138,162)
Net change in :
Demand and savings deposits	240,736	53,062	141,052
Certificates of deposit and other time deposits	(79,656)	127,740	(211,399)
Borrowings	491,660	678,290	295,537
Repayment of borrowings	(370,813)	(789,563)	(163,838)
Cash dividends on common stock	$ (15,654)	$ (10,694)	(5,612)
Cash dividends on preferred stock			(2,380)
Stock issued under employee benefit plans	$ 460	$ 478	479
Stock issued under dividend reinvestment and stock purchase plans	661	523	325
Stock options exercised	1,461	504	$ 115
Tax benefit from stock options exercised	$ 70	$ 60
Cumulative preferred stock redeemed (SBLF)			$ (90,783)
Stock redeemed	$ (1,640)	$ (1,067)	(491)
Net cash provided by (used in) financing activities	267,285	59,333	(36,995)
Net Change in Cash and Cash Equivalents	(16,446)	9,182	7,974
Cash and Cash Equivalents, beginning of the year	118,616	109,434	101,460
Cash and Cash Equivalents, end of year	102,170	118,616	109,434
Additional cash flow information:
Interest paid	24,903	20,412	16,639
Income tax paid	21,200	6,209	7,578
Loans transferred to other real estate owned	3,644	4,431	7,170
Fixed assets transferred to other real estate owned	1,600	297	461
Non-cash investing activities using trade date accounting	1,559	3,170	4,984
Liabilities assumed in conjunction with acquisitions
Fair value of assets acquired	635,047	280,725	$ 1,132,231
Cash received (paid) in acquisition	(14,500)	(14,208)
Less: Common stock issued	70,402	34,981	$ 135,642
Liabilities assumed	$ 550,145	$ 231,536	$ 996,589