Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 57,312		$ 37,759
Securities available for sale	439,540		464,088
Loans held for sale	4,330		3,624
Net loans	585,012		578,963
Premises and equipment, net	18,143		18,429
Goodwill and other intangibles	5,934		6,032
Other assets	32,828		30,800
TOTAL ASSETS	1,143,099		1,139,695
Liabilities and Stockholders’ Equity
Deposits, borrowings and other liabilities	1,022,523		1,018,903
Stockholders’ equity	120,576		120,792
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,143,099		1,139,695
Income Statement
Net interest income	8,968	9,221
Provision for loan losses	255	0
Service fees, security gains and other noninterest income	2,875	2,719
Noninterest expense	9,088	8,630
Income before taxes	2,500	3,310
Income taxes	495	790
Net income	2,005	2,520
Trust Segment
Assets
Cash and cash equivalents	651		636
Securities available for sale	4,967		4,695
Loans held for sale	0		0
Net loans	0		0
Premises and equipment, net	95		100
Goodwill and other intangibles	5,934		6,032
Other assets	885		546
TOTAL ASSETS	12,532		12,009
Liabilities and Stockholders’ Equity
Deposits, borrowings and other liabilities	703		302
Stockholders’ equity	11,829		11,707
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	12,532		12,009
Income Statement
Net interest income	12	10
Provision for loan losses	0	0
Service fees, security gains and other noninterest income	1,365	1,437
Noninterest expense	1,190	1,264
Income before taxes	187	183
Income taxes	65	63
Net income	122	120
Bank Segment
Assets
Cash and cash equivalents	56,746		37,191
Securities available for sale	434,433		459,246
Loans held for sale	4,330		3,624
Net loans	585,012		578,963
Premises and equipment, net	18,048		18,329
Goodwill and other intangibles	0		0
Other assets	31,338		29,758
TOTAL ASSETS	1,129,907		1,127,111
Liabilities and Stockholders’ Equity
Deposits, borrowings and other liabilities	1,025,837		1,022,092
Stockholders’ equity	104,070		105,019
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	1,129,907		1,127,111
Income Statement
Net interest income	8,959	9,223
Provision for loan losses	255	0
Service fees, security gains and other noninterest income	1,560	1,326
Noninterest expense	7,684	7,213
Income before taxes	2,580	3,336
Income taxes	521	798
Net income	2,059	2,538
Eliminations and Others
Assets
Cash and cash equivalents	(85)		(68)
Securities available for sale	140		147
Loans held for sale	0		0
Net loans	0		0
Premises and equipment, net	0		0
Goodwill and other intangibles	0		0
Other assets	605		496
TOTAL ASSETS	660		575
Liabilities and Stockholders’ Equity
Deposits, borrowings and other liabilities	(4,017)		(3,491)
Stockholders’ equity	4,677		4,066
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	660		575
Income Statement
Net interest income	(3)	(12)
Provision for loan losses	0	0
Service fees, security gains and other noninterest income	(50)	(44)
Noninterest expense	214	153
Income before taxes	(267)	(209)
Income taxes	(91)	(71)
Net income	$ (176)	$ (138)