CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income:
Interest and fees on loans	$ 119,491	$ 114,229	$ 107,842
Taxable interest on securities	11,584	8,875	10,437
Nontaxable interest on securities	982	1,555	2,149
Dividends on corporate stock and Federal Home Loan Bank stock	1,091	953	561
Other interest income	322	138	128
Total interest and dividend income	133,470	125,750	121,117
Interest expense:
Deposits	12,504	13,142	12,937
Federal Home Loan Bank advances	9,992	7,746	7,698
Junior subordinated debentures	491	871	964
Other interest expense	5	9	13
Total interest expense	22,992	21,768	21,612
Net interest income	110,478	103,982	99,505
Provision for loan losses	5,650	1,050	1,850
Net interest income after provision for loan losses	104,828	102,932	97,655
Noninterest income:
Wealth management revenues	37,569	35,416	33,378
Merchant processing fees	0	0	1,291
Mortgage banking revenues	13,183	9,901	7,152
Service charges on deposit accounts	3,702	3,865	3,395
Card interchange fees	3,385	3,199	3,057
Income from bank-owned life insurance	2,659	1,982	1,846
Loan related derivative income	3,243	2,441	1,136
Equity in earnings (losses) of unconsolidated subsidiaries	(354)	(293)	(276)
Net gain on sale of business line	0	0	6,265
Other income	1,742	1,829	1,771
Total noninterest income	65,129	58,340	59,015
Noninterest expense:
Salaries and employee benefits	67,221	63,024	58,530
Net occupancy	7,151	7,000	6,312
Equipment	6,208	5,533	4,903
Merchant processing costs	0	0	1,050
Outsourced services	5,222	5,111	4,483
Legal, audit and professional fees	2,579	2,741	2,336
FDIC deposit insurance costs	1,878	1,846	1,762
Advertising and promotion	1,458	1,526	1,546
Amortization of intangibles	1,284	904	644
Debt prepayment penalties	431	0	6,294
Acquisition related expenses	0	989	0
Change in fair value of contingent consideration	(898)	41	0
Other expenses	8,569	8,214	8,987
Total noninterest expense	101,103	96,929	96,847
Income before income taxes	68,854	64,343	59,823
Income tax expense	22,373	20,878	18,999
Net income	$ 46,481	$ 43,465	$ 40,824
Weighted average common shares outstanding - basic	17,081	16,879	16,689
Weighted average common shares outstanding - diluted	17,208	17,067	16,872
Per share information:
Basic earnings per common share (in dollars per share)	$ 2.72	$ 2.57	$ 2.44
Diluted earnings per common share (in dollars per share)	2.70	2.54	2.41
Cash dividends declared per share (in dollars per share)	$ 1.46	$ 1.36	$ 1.22