Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest Income
Interest and fees on loans	$ 48,029	$ 47,894	$ 95,934	$ 96,150
Interest on investment securities:
Taxable	2,585	2,587	5,023	5,152
Tax-exempt	1,587	1,465	3,151	2,950
Dividends on nonmarketable equity securities	400	380	551	510
Interest on deposits with the Federal Reserve Bank	180	141	501	369
Total interest income	52,781	52,467	105,160	105,131
Interest Expense
Interest on deposits	4,264	5,659	8,830	11,761
Interest on short-term borrowings	121	108	235	212
Interest on FHLB advances	0	254	47	517
Total interest expense	4,385	6,021	9,112	12,490
Net Interest Income	48,396	46,446	96,048	92,641
Provision for loan losses	3,000	4,000	6,000	9,000
Net interest income after provision for loan losses	45,396	42,446	90,048	83,641
Noninterest Income
Service charges and fees on deposit accounts	5,535	5,013	10,730	9,518
Wealth management revenue	3,879	3,169	7,324	6,090
Other charges and fees for customer services	4,303	3,684	8,954	7,049
Mortgage banking revenue	1,649	1,417	3,661	2,602
Gain on sale of investment securities	257	0	1,104	0
Gain on sale of merchant card services	0	0	0	1,280
Other	325	661	414	730
Total noninterest income	15,948	13,944	32,187	27,269
Operating Expenses
Salaries, wages and employee benefits	24,628	20,539	47,997	41,108
Occupancy	3,380	2,973	7,043	6,127
Equipment and software	3,447	3,127	6,897	6,245
Other	9,586	9,560	21,061	19,690
Total operating expenses	41,041	36,199	82,998	73,170
Income before income taxes	20,303	20,191	39,237	37,740
Federal income tax expense	6,100	6,325	11,800	11,500
Net Income	$ 14,203	$ 13,866	$ 27,437	$ 26,240
Net Income Per Common Share:
Basic (in dollars per share)	$ 0.52	$ 0.50	$ 1.00	$ 0.95
Diluted (in dollars per share)	$ 0.51	$ 0.50	$ 0.99	$ 0.95
Cash Dividends Declared Per Common Share (dollars per share)	$ 0.21	$ 0.20	$ 0.42	$ 0.40