Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Interest income
Interest and fees on loans	$ 55,636	$ 54,016	$ 109,905	$ 105,704
Taxable interest and dividends on securities	5,269	4,852	10,466	9,479
Nontaxable interest and dividends on securities	29	30	61	64
Interest on loans held for sale	57	58	89	109
Interest on federal funds sold and short-term investments	169	60	380	91
Total interest and dividend income	61,160	59,016	120,901	115,447
Interest expense
Interest on deposits	2,738	2,922	5,606	5,685
Interest on borrowings	1,889	2,347	3,871	4,765
Total interest expense	4,627	5,269	9,477	10,450
Net interest income	56,533	53,747	111,424	104,997
Provision for loan losses	600	700	1,125	200
Net interest income after provision for loan losses	55,933	53,047	110,299	104,797
Noninterest income
Deposit account fees	4,471	4,465	8,941	8,631
Interchange and ATM fees	4,136	3,767	7,860	6,868
Investment management	5,734	5,528	10,737	10,635
Mortgage banking income	1,363	1,226	2,495	2,352
Available-For-Sale- Securities - Equity - Gross Realized Gains	5	19	5	19
Available-For-Sale Securities - Fixed Income Gross Realized Gains	0	798	0	798
Increase in cash surrender value of life insurance policies	982	949	1,996	1,727
Loan level derivative income	2,095	1,430	3,817	1,848
Other noninterest income	2,309	2,079	4,399	3,939
Total noninterest income	21,095	20,261	40,250	36,817
Noninterest expenses
Salaries and employee benefits	26,977	26,318	54,166	51,606
Occupancy and equipment expenses	5,667	5,672	11,494	12,066
Data processing & facilities management	1,225	1,228	2,431	2,350
FDIC assessment	920	1,017	1,930	1,973
Advertising expense	1,223	1,853	2,480	2,687
Consulting expense	864	829	1,465	1,585
Loss on extinguishment of debt	0	0	437	122
Available-For-Sale Securities - Equity Gross Realized Losses	3	8	32	8
Available-for-Sale Securities - Fixed Income Gross Realized Losses	0	1,124	0	1,124
Business Combination, Acquisition Related Costs	206	271	540	10,501
Software Maintenance	735	677	1,489	1,302
Other noninterest expenses	9,326	9,647	17,164	18,298
Total noninterest expenses	47,146	48,644	93,628	103,622
Income before income taxes	29,882	24,664	56,921	37,992
Provision for income taxes	9,508	7,213	17,936	11,082
Net income	$ 20,374	$ 17,451	$ 38,985	$ 26,910
Basic earnings per share (in dollars per share)	$ 0.77	$ 0.67	$ 1.48	$ 1.05
Diluted earnings per share (in dollars per share)	$ 0.77	$ 0.67	$ 1.48	$ 1.05
Weighted average common shares (basic) (in shares)	26,304,129	26,149,593.000	26,289,726	25,558,016
Common shares equivalents (in shares)	47,885	71,819.000	45,679	76,626
Weighted average common shares (diluted) (in shares)	26,352,014	26,221,412	26,335,405	25,634,642
Retained Earnings [Member]
Noninterest expenses
Net income			$ 38,985	$ 26,910
Cash dividends declared per common share (in dollars per share)	$ 0.29	$ 0.26	$ 0.58	$ 0.52