Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest Income
Interest and fees on loans	$ 49,017	$ 48,322	$ 144,951	$ 144,472
Interest on investment securities:
Taxable	2,714	2,458	7,737	7,610
Tax-exempt	1,587	1,457	4,738	4,407
Dividends on nonmarketable equity securities	150	128	701	638
Interest on deposits with the Federal Reserve Bank	110	136	611	505
Total interest income	53,578	52,501	158,738	157,632
Interest Expense
Interest on deposits	4,160	5,238	12,990	16,999
Interest on short-term borrowings	124	105	359	317
Interest on FHLB advances	0	248	47	765
Total interest expense	4,284	5,591	13,396	18,081
Net Interest Income	49,294	46,910	145,342	139,551
Provision for loan losses	3,000	4,500	9,000	13,500
Net interest income after provision for loan losses	46,294	42,410	136,342	126,051
Noninterest Income
Service charges and fees on deposit accounts	5,690	5,028	16,420	14,546
Wealth management revenue	3,369	2,745	10,693	8,835
Other charges and fees for customer services	4,272	3,435	13,226	10,484
Mortgage banking revenue	1,038	1,457	4,699	4,059
Gain on sale of investment securities	0	0	1,104	0
Gain on sale of merchant card services	0	0	0	1,280
Other	275	54	689	784
Total noninterest income	14,644	12,719	46,831	39,988
Operating Expenses
Salaries, wages and employee benefits	24,065	20,738	72,062	61,846
Occupancy	3,406	3,137	10,449	9,264
Equipment and software	3,354	3,406	10,251	9,651
Other	8,720	9,442	29,781	29,132
Total operating expenses	39,545	36,723	122,543	109,893
Income before income taxes	21,393	18,406	60,630	56,146
Federal income tax expense	6,400	5,300	18,200	16,800
Net Income	$ 14,993	$ 13,106	$ 42,430	$ 39,346
Net Income Per Common Share:
Basic (in dollars per share)	$ 0.54	$ 0.48	$ 1.54	$ 1.43
Diluted (in dollars per share)	$ 0.53	$ 0.48	$ 1.53	$ 1.43
Cash Dividends Declared Per Common Share (dollars per share)	$ 0.22	$ 0.21	$ 0.64	$ 0.61