Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
INTEREST INCOME
Loans	$ 83,982	$ 75,251	$ 73,166
Investment securities
Available for sale—taxable	8,453	9,379	10,863
Held to maturity—taxable	5,622	8,078	10,879
Tax exempt	6,293	6,359	4,824
Federal Reserve and Federal Home Loan Bank stock	409	371	445
Deposits with other banks	136	227	75
Total interest income	104,895	99,665	100,252
Deposits
Savings, NOW and Money Market	2,586	2,855	3,288
Time	4,151	5,583	6,300
Federal funds purchased	22	14	74
Commercial paper and other short-term borrowings	43	45	63
Advances—FHLB	1,913	2,144	3,482
Long-term borrowings—subordinated debentures	2,094	2,094	2,094
Total interest expense	10,981	12,987	15,583
Net interest income	93,914	86,678	84,669
Provision for loan losses	10,250	12,000	28,500
Net interest income after provision for loan losses	83,664	74,678	56,169
NONINTEREST INCOME
Accounts receivable management/factoring commissions and other fees	19,131	22,371	20,510
Service charges on deposit accounts	5,301	5,093	5,506
Trade finance income	1,922	2,222	2,264
Other customer related service charges and fees	1,001	943	777
Mortgage banking income	10,275	6,315	8,164
Trust fees		53	329
Income from life insurance policies	1,315	1,140	1,138
Securities gains	1,813	2,491	3,928
Loss on other real estate owned	(61)		(64)
Other income	76	270	1,275
Total noninterest income	40,773	40,898	43,827
NONINTEREST EXPENSES
Salaries	45,530	43,748	41,586
Employee benefits	14,902	13,898	12,220
Total personnel expense	60,432	57,646	53,806
Occupancy and equipment expenses, net	13,689	13,248	12,296
Advertising and marketing	2,815	2,792	3,381
Professional fees	4,841	5,219	5,464
Communications	2,029	1,756	1,691
Deposit insurance	2,229	2,747	3,809
Other expenses	9,849	10,376	10,365
Total noninterest expenses	95,884	93,784	90,812
Income before income taxes	28,553	21,792	9,184
Provision for income taxes	8,537	4,196	2,158
Net income	20,016	17,596	7,026
Dividends on preferred shares and accretion		2,074	2,589
Net income available to common shareholders	20,016	15,522	4,437
Average number of common shares outstanding
Basic (in Shares)	30,828,293	30,038,047	24,492,279
Diluted (in Shares)	30,828,293	30,038,047	24,495,044
Net income available to common shareholders, per average common share
Basic (in Dollars per share)	$ 0.65	$ 0.51	$ 0.18
Diluted (in Dollars per share)	$ 0.65	$ 0.51	$ 0.18
Dividends per common share (in Dollars per share)	$ 0.36	$ 0.36	$ 0.36
Federal Reserve Bank [Member]
Deposits
Short-term borrowings—FRB			9
Customers [Member]
Deposits
Interest expense securities sold under agreements to repurchase	141	186	229
Dealers [Member]
Deposits
Interest expense securities sold under agreements to repurchase	$ 31	$ 66	$ 44