CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except 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:
Loans and leases	$ 40,112	$ 40,318	$ 79,282	$ 80,214
Investment securities, taxable	3,498	4,334	7,193	8,661
Investment securities, tax-exempt	760	848	1,531	1,700
Other	241	231	483	457
Total interest income	44,611	45,731	88,489	91,032
Interest expense:
Deposits	4,412	5,704	8,954	11,449
Short-term borrowings	45	47	77	100
Subordinated notes	1,055	1,648	2,110	3,295
Long-term debt and mandatorily redeemable securities	228	357	723	828
Total interest expense	5,740	7,756	11,864	15,672
Net interest income	38,871	37,975	76,625	75,360
Provision for loan and lease losses	1,293	2,055	2,050	4,309
Net interest income after provision for loan and lease losses	37,578	35,920	74,575	71,051
Noninterest income:
Trust fees	4,439	4,379	8,540	8,352
Service charges on deposit accounts	2,325	2,621	4,564	5,059
Debit card income	2,344	2,194	4,409	4,261
Mortgage banking income	1,936	1,502	3,564	3,444
Insurance commissions	1,393	1,211	2,839	2,568
Equipment rental income	4,086	4,666	8,098	10,016
Investment securities and other investment gains	38	8	211	403
Other income	3,560	3,209	6,844	6,210
Total noninterest income	20,121	19,790	39,069	40,313
Noninterest expense:
Salaries and employee benefits	19,176	20,370	39,112	40,686
Net occupancy expense	2,147	1,848	4,354	4,008
Furniture and equipment expense	3,909	3,831	7,808	7,338
Depreciation - leased equipment	3,274	3,803	6,499	8,114
Professional fees	1,310	1,449	2,665	2,847
Supplies and communication	1,499	1,385	3,035	2,778
FDIC and other insurance	927	854	1,805	1,803
Business development and marketing expense	932	1,050	1,705	1,917
Loan and lease collection and repossession expense	1,095	979	1,852	2,480
Other expense	1,475	1,009	3,459	2,655
Total noninterest expense	35,744	36,578	72,294	74,626
Income before income taxes	21,955	19,132	41,350	36,738
Income tax expense	8,013	6,565	15,004	12,456
Net income	$ 13,942	$ 12,567	$ 26,346	$ 24,282
Per common share:
Basic net income per common share (in dollars per share)	$ 0.56	$ 0.51	$ 1.07	$ 0.99
Diluted net income per common share (in dollars per share)	$ 0.56	$ 0.51	$ 1.07	$ 0.99
Dividends (in dollars per share)	$ 0.17	$ 0.16	$ 0.34	$ 0.32
Basic weighted average common shares outstanding (in shares)	24,367,529	24,263,881	24,344,882	24,261,649
Diluted weighted average common shares outstanding (in shares)	24,368,973	24,273,898	24,346,053	24,272,423