Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Interest income
Interest on loans, including fees	$ 189,748		$ 178,309		$ 174,450
Taxable interest and dividends on securities	15,137		16,681		20,326
Nontaxable interest and dividends on securities	55		82		331
Interest on loans held for sale	774		988		482
Interest on federal funds sold	200		132		162
Total interest and dividend income	205,914		196,192		195,751
Interest expense
Interest on deposits	10,624		10,703		13,355
Interest on borrowings	12,712		12,690		15,317
Total interest expense	23,336		23,393		28,672
Net interest income	182,578		172,799		167,079
Provision	10,200		18,056		11,482
Net interest income after provision for loan losses	172,378		154,743		155,597
Noninterest income
Deposit account fees	17,940		15,930		16,628
Interchange and ATM fees	10,883		9,783		7,733
Investment management	16,832		14,779		13,532
Mortgage banking income	6,734		6,500		4,197
Increase in cash surrender value of life insurance policies	3,229		3,114		3,170
Gain on life insurance benefits	227		1,307
Gains (Losses) on Extinguishment of Debt	763		0		0
Loan level derivative income	3,439		3,457		2,093
Net gain on sales of securities	230		116		723
Other noninterest income	7,732		7,030		4,624
Total noninterest income	68,009		62,016		52,700
Noninterest expenses
Salaries and employee benefits	89,894		84,014		81,275
Occupancy and equipment expenses	19,650		17,307		16,916
Data processing & facilities management	4,748		4,644		4,891
FDIC assessment	3,579		3,232		3,496
Advertising	4,280		3,949		3,876
Consulting	3,322		2,801		2,660
Debit Card	2,994		2,510		2,123
Goodwill impairment		[1]	2,227	[1]		[1]
Merger and acquisition	8,685		6,741
Prepayment fees on borrowings			7		757
Other noninterest expenses	36,497		32,027		29,719
Total noninterest expenses	173,649		159,459		145,713
Income before income taxes	66,738		57,300		62,584
Provision for income taxes	16,484		14,673		17,148
Net income	$ 50,254		$ 42,627		$ 45,436
Basic earnings per share (in dollars per share)	$ 2.18		$ 1.96		$ 2.12
Diluted earnings per share (in dollars per share)	$ 2.18		$ 1.95		$ 2.12
Weighted average common shares (basic) (in shares)	23,011,814		21,782,499		21,422,757
Common share equivalents (in shares)	76,764		29,817		28,830
Weighted average common shares (diluted) (in shares)	23,088,578		21,812,316		21,451,587
Cash dividends declared (in dollars per share)	$ 0.88		$ 0.84		$ 0.76

[1] Amount represents the total amount of goodwill relating to Compass Exchange Advisors, LLC, which was acquired in January 2007.