CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest income:
Interest and fees on loans	$ 102,481	$ 102,656	$ 99,319
Interest on securities: Taxable	11,008	15,359	18,704
Interest on securities: Nontaxable	2,553	2,699	3,001
Dividends on corporate stock and Federal Home Loan Bank stock	148	256	253
Other interest income	158	91	69
Total interest and dividend income	116,348	121,061	121,346
Interest expense:
Deposits	12,420	13,590	15,692
Federal Home Loan Bank advances	10,643	14,957	18,158
Junior subordinated debentures	1,484	1,570	1,568
Other interest expense	16	248	973
Total interest expense	24,563	30,365	36,391
Net interest income	91,785	90,696	84,955
Provision for loan losses	2,400	2,700	4,700
Net interest income after provision for loan losses	89,385	87,996	80,255
Noninterest income:
Wealth management revenues	31,825	29,641	28,306
Service charges on deposit accounts	3,256	3,193	3,455
Merchant processing fees	10,220	10,159	9,905
Card interchange fees	2,788	2,480	2,249
Income from bank-owned life insurance	1,850	2,448	1,939
Net gains on loan sales and commissions on loans originated for others	13,085	14,092	5,074
Net realized gains on securities	0	1,223	698
Net gains on interest rate swap contracts	951	255	6
Equity in earnings (losses) of unconsolidated subsidiaries	(107)	196	(213)
Other income	1,701	1,748	1,536
Noninterest income, excluding other-than-temporary impairment losses	65,569	65,435	52,955
Total other-than-temporary impairment losses on securities	(294)	(28)	(54)
Portion of loss recognized in other comprehensive income (before tax)	(3,195)	(193)	(137)
Net impairment losses recognized in earnings	(3,489)	(221)	(191)
Total noninterest income	62,080	65,214	52,764
Noninterest expense:
Salaries and employee benefits	60,052	59,786	51,095
Net occupancy	5,769	6,039	5,295
Equipment	4,847	4,640	4,344
Merchant processing costs	8,682	8,593	8,560
Outsourced services	3,662	3,560	3,530
Legal, audit and professional fees	2,330	2,240	1,927
FDIC deposit insurance costs	1,761	1,730	2,043
Advertising and promotion	1,464	1,730	1,819
Amortization of intangibles	680	728	951
Foreclosed property costs	258	762	878
Debt prepayment penalties	1,125	3,908	694
Other expenses	8,155	8,622	9,237
Total noninterest expense	98,785	102,338	90,373
Income before income taxes	52,680	50,872	42,646
Income tax expense	16,527	15,798	12,922
Net income	$ 36,153	$ 35,074	$ 29,724
Weighted average common shares outstanding - basic	16,506	16,358	16,254
Weighted average common shares outstanding - diluted	16,664	16,401	16,284
Per share information:
Basic earnings per common share (in dollars per share)	$ 2.18	$ 2.13	$ 1.82
Diluted earnings per common share (in dollars per share)	$ 2.16	$ 2.13	$ 1.82
Cash dividends declared per share (in dollars per share)	$ 1.03	$ 0.94	$ 0.88