Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest Income
Interest and fees on loans	$ 52,343	$ 49,017	$ 152,289	$ 144,951
Interest on investment securities:
Taxable	2,194	2,714	6,825	7,737
Tax-exempt	1,838	1,587	5,213	4,738
Dividends on nonmarketable equity securities	160	150	809	701
Interest on deposits with the Federal Reserve Bank	94	110	318	611
Total interest income	56,629	53,578	165,454	158,738
Interest Expense
Interest on deposits	3,469	4,160	10,840	12,990
Interest on short-term borrowings	92	124	307	359
Interest on Federal Home Loan Bank (FHLB) advances	0	0	0	47
Total interest expense	3,561	4,284	11,147	13,396
Net Interest Income	53,068	49,294	154,307	145,342
Provision for loan losses	1,500	3,000	4,600	9,000
Net interest income after provision for loan losses	51,568	46,294	149,707	136,342
Noninterest Income
Service charges and fees on deposit accounts	5,612	5,690	16,028	16,420
Wealth management revenue	3,730	3,369	11,319	10,693
Other charges and fees for customer services	4,686	4,272	13,562	13,226
Mortgage banking revenue	1,166	1,038	3,451	4,699
Gain on sale of investment securities	0	0	0	1,104
Other	157	275	508	689
Total noninterest income	15,351	14,644	44,868	46,831
Operating Expenses
Salaries, wages and employee benefits	24,885	24,065	73,929	72,062
Occupancy	3,629	3,406	11,641	10,449
Equipment and software	3,772	3,354	11,025	10,251
Other	10,416	8,720	30,714	29,781
Total operating expenses	42,702	39,545	127,309	122,543
Income before income taxes	24,217	21,393	67,266	60,630
Federal income tax expense	7,450	6,400	20,450	18,200
Net Income	$ 16,767	$ 14,993	$ 46,816	$ 42,430
Net Income Per Common Share:
Basic (in dollars per share)	$ 0.51	$ 0.54	$ 1.52	$ 1.54
Diluted (in dollars per share)	$ 0.51	$ 0.53	$ 1.51	$ 1.53
Cash Dividends Declared Per Common Share (dollars per share)	$ 0.24	$ 0.22	$ 0.7	$ 0.64