Consolidated Statements of Cash Flows (Unaudited)	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 38,985,000	$ 26,910,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	7,242,000	6,431,000
Provision for loan losses	1,125,000	200,000
Deferred income tax expense	415,000	5,372,000
Net loss on sale of securities	27,000	315,000
Net loss on fixed assets	13,000	110,000
Loss on extinguishment of debt	437,000	122,000
Net loss on other real estate owned and foreclosed assets	41,000	630,000
Realized gain on sale leaseback transaction	(517,000)	(517,000)
Stock based compensation	1,633,000	1,362,000
Excess tax benefit related to equity award activity	(327,000)	(546,000)
Increase in cash surrender value of life insurance policies	(1,996,000)	(1,727,000)
Change in fair value on loans held for sale	(13,000)	(184,000)
Net change in:
Trading assets	(443,000)	(489,000)
Loans held for sale	(6,924,000)	(3,656,000)
Other assets	(45,265,000)	16,066,000
Increase (Decrease) in Other Operating Liabilities	19,615,000	(12,527,000)
Total adjustments	(24,937,000)	10,962,000
Net cash provided by operating activities	14,048,000	37,872,000
Cash flows used in investing activities
Proceeds from sales of securities available for sale	285,000	14,344,000
Proceeds from maturities and principal repayments of securities available for sale	32,625,000	34,849,000
Purchases of securities available for sale	(46,358,000)	(34,193,000)
Proceeds from maturities and principal repayments of securities held to maturity	39,028,000	29,030,000
Purchases of securities held to maturity		(81,859,000)
Redemption of Federal Home Loan Bank stock	3,127,000
Investments in low income housing projects	(4,431,000)	(12,272,000)
Purchases of life insurance policies	(101,000)	(100,000)
Net increase in loans	(126,406,000)	(1,137,000)
Cash used in business combinations, net of cash acquired	0	(13,448,000)
Purchases of bank premises and equipment	(4,003,000)	(4,537,000)
Proceeds from the sale of bank premises and equipment	14,000	347,000
Proceeds from the sale of other real estate owned and foreclosed assets	795,000	3,879,000
Net payments relating to other real estate owned and foreclosed assets	(145,000)	(765,000)
Net cash used in investing activities	(105,570,000)	(65,862,000)
Cash flows provided by financing activities
Net decrease in time deposits	(40,755,000)	(39,853,000)
Net increase in other deposits	247,944,000	367,667,000
Net repayments of short-term Federal Home Loan Bank borrowings		(10,000,000)
Repayments of long-term Federal Home Loan Bank borrowings	(51,641,000)	(3,000,000)
Net increase (decrease) in customer repurchase agreements	5,758,000	(28,451,000)
Repayments of subordinated debentures	0	(30,000,000)
Net proceeds from exercise of stock options	144,000	311,000
Restricted stock awards issued, net of awards surrendered	(673,000)	(645,000)
Excess tax benefit from stock based compensation	327,000	546,000
Tax benefit from deferred compensation distribution	179,000	165,000
Proceeds from shares issued under direct stock purchase plan	1,060,000	1,327,000
Common dividends paid	(14,449,000)	(12,555,000)
Net cash provided by financing activities	147,894,000	245,512,000
Net increase in cash and cash equivalents	56,372,000	217,522,000
Cash and cash equivalents at beginning of year	275,765,000	178,254,000
Cash and cash equivalents at end of period	332,137,000	395,776,000
Supplemental schedule of noncash investing and financing activities
Real Estate Owned, Transfer from Real Estate Owned	377,000	983,000
Other net transfers to other real estate owned		142,000
Net decrease in capital commitments relating to low income housing project investments	180,000	1,055,000
Common stock issued for acquisition	$ 0	86,415,000
Fair value of assets acquired, net of cash acquired		598,376,000
Fair value of liabilities assumed		$ 498,513,000