CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest income:
Interest and fees on loans	$ 114,229	$ 107,842	$ 102,481
Interest on securities: Taxable	8,875	10,437	11,008
Interest on securities: Nontaxable	1,555	2,149	2,553
Dividends on corporate stock and Federal Home Loan Bank stock	953	561	148
Other interest income	138	128	158
Total interest and dividend income	125,750	121,117	116,348
Interest expense:
Deposits	13,142	12,937	12,420
Federal Home Loan Bank advances	7,746	7,698	10,643
Junior subordinated debentures	871	964	1,484
Other interest expense	9	13	16
Total interest expense	21,768	21,612	24,563
Net interest income	103,982	99,505	91,785
Provision for loan losses	1,050	1,850	2,400
Net interest income after provision for loan losses	102,932	97,655	89,385
Noninterest income:
Wealth management revenues	35,416	33,378	31,825
Merchant processing fees	0	1,291	10,220
Mortgage banking revenues	9,901	7,152	13,293
Service charges on deposit accounts	3,865	3,395	3,256
Card interchange fees	3,199	3,057	2,788
Income from bank-owned life insurance	1,982	1,846	1,850
Loan related derivative income	2,441	1,136	951
Equity in earnings (losses) of unconsolidated subsidiaries	(293)	(276)	(107)
Net gain on sale of business line	0	6,265	0
Other income	1,829	1,771	1,493
Noninterest income, excluding other-than-temporary impairment losses	58,340	59,015	65,569
Total other-than-temporary impairment losses on securities	0	0	(294)
Portion of loss recognized in other comprehensive income (before tax)	0	0	(3,195)
Net impairment losses recognized in earnings	0	0	(3,489)
Total noninterest income	58,340	59,015	62,080
Noninterest expense:
Salaries and employee benefits	63,024	58,530	60,052
Net occupancy	7,000	6,312	5,769
Equipment	5,533	4,903	4,847
Merchant processing costs	0	1,050	8,682
Outsourced services	5,111	4,483	3,662
Legal, audit and professional fees	2,741	2,336	2,330
FDIC deposit insurance costs	1,846	1,762	1,761
Advertising and promotion	1,526	1,546	1,464
Amortization of intangibles	904	644	680
Debt prepayment penalties	0	6,294	1,125
Acquisition related expenses	989	0	0
Other expenses	8,255	8,987	8,413
Total noninterest expense	96,929	96,847	98,785
Income before income taxes	64,343	59,823	52,680
Income tax expense	20,878	18,999	16,527
Net income	$ 43,465	$ 40,824	$ 36,153
Weighted average common shares outstanding - basic	16,879	16,689	16,506
Weighted average common shares outstanding - diluted	17,067	16,872	16,664
Per share information:
Basic earnings per common share (in dollars per share)	$ 2.57	$ 2.44	$ 2.18
Diluted earnings per common share (in dollars per share)	2.54	2.41	2.16
Cash dividends declared per share (in dollars per share)	$ 1.36	$ 1.22	$ 1.03