Loans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Analysis of allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	$ 30,437		$ 40,765	$ 32,325		$ 44,275
Additions (deductions) [Abstract]
Provision for loan losses	(1,845)		(2,107)	(1,417)		(2,798)
Recoveries credited to allowance	2,891		3,958	3,959		5,409
Loans charged against the allowance	(3,286)		(5,830)	(6,670)		(10,100)
Balance at end of period	28,197		36,786	28,197		36,786
Allowance for loan losses [Abstract]
Individually evaluated for impairment	13,229			13,229			15,158
Collectively evaluated for impairment	14,968			14,968			17,167
Total ending allowance balance	28,197			28,197			32,325
Loans [Abstract]
Individually evaluated for impairment	119,623			119,623			125,713
Collectively evaluated for impairment	1,262,205			1,262,205			1,253,436
Total loans recorded investment	1,381,828			1,381,828			1,379,149
Accrued interest included in recorded investment	4,334			4,334			4,579
Total Loans	1,377,494			1,377,494			1,374,570
Commercial [Member]
Analysis of allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	5,763		10,058	6,827		11,402
Additions (deductions) [Abstract]
Provision for loan losses	(1,070)		(1,404)	(563)		(1,676)
Recoveries credited to allowance	2,138		3,181	2,493		3,717
Loans charged against the allowance	(1,656)		(3,599)	(3,582)		(5,207)
Balance at end of period	5,175		8,236	5,175		8,236
Allowance for loan losses [Abstract]
Individually evaluated for impairment	2,482			2,482			3,878
Collectively evaluated for impairment	2,693			2,693			2,949
Total ending allowance balance	5,175			5,175			6,827
Loans [Abstract]
Individually evaluated for impairment	36,764			36,764			40,623
Collectively evaluated for impairment	618,953			618,953			596,235
Total loans recorded investment	655,717			655,717			636,858
Accrued interest included in recorded investment	1,469			1,469			1,624
Total Loans	654,248			654,248			635,234
Mortgage [Member]
Analysis of allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	17,000		20,163	17,195		21,447
Additions (deductions) [Abstract]
Provision for loan losses	(579)		(349)	(386)		(488)
Recoveries credited to allowance	400		450	858		1,072
Loans charged against the allowance	(1,279)		(1,605)	(2,125)		(3,372)
Balance at end of period	15,542		18,659	15,542		18,659
Allowance for loan losses [Abstract]
Individually evaluated for impairment	10,029			10,029			10,488
Collectively evaluated for impairment	5,513			5,513			6,707
Total ending allowance balance	15,542			15,542			17,195
Loans [Abstract]
Individually evaluated for impairment	75,899			75,899			78,022
Collectively evaluated for impairment	398,512			398,512			410,887
Total loans recorded investment	474,411			474,411			488,909
Accrued interest included in recorded investment	2,209	[1]		2,209	[1]		2,276	[1]
Total Loans	472,202			472,202			486,633
Installment [Member]
Analysis of allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	2,061		3,162	2,246		3,378
Additions (deductions) [Abstract]
Provision for loan losses	(76)		141	100		516
Recoveries credited to allowance	352		306	603		592
Loans charged against the allowance	(349)		(613)	(961)		(1,490)
Balance at end of period	1,988		2,996	1,988		2,996
Allowance for loan losses [Abstract]
Individually evaluated for impairment	718			718			792
Collectively evaluated for impairment	1,270			1,270			1,454
Total ending allowance balance	1,988			1,988			2,246
Loans [Abstract]
Individually evaluated for impairment	6,960			6,960			7,068
Collectively evaluated for impairment	194,902			194,902			185,676
Total loans recorded investment	201,862			201,862			192,744
Accrued interest included in recorded investment	656	[1]		656	[1]		679	[1]
Total Loans	201,206			201,206			192,065
Payment Plan Receivable [Member]
Analysis of allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	87		129	97		144
Additions (deductions) [Abstract]
Provision for loan losses	(6)		(12)	(20)		(16)
Recoveries credited to allowance	1		21	5		28
Loans charged against the allowance	(2)		(13)	(2)		(31)
Balance at end of period	80		125	80		125
Allowance for loan losses [Abstract]
Individually evaluated for impairment	0			0			0
Collectively evaluated for impairment	80			80			97
Total ending allowance balance	80			80			97
Loans [Abstract]
Individually evaluated for impairment	0			0			0
Collectively evaluated for impairment	49,838			49,838			60,638
Total loans recorded investment	49,838			49,838			60,638
Accrued interest included in recorded investment	0			0			0
Total Loans	49,838			49,838			60,638
Unallocated [Member]
Analysis of allowance for loan losses by portfolio segment [Roll Forward]
Balance at beginning of period	5,526		7,253	5,960		7,904
Additions (deductions) [Abstract]
Provision for loan losses	(114)		(483)	(548)		(1,134)
Recoveries credited to allowance	0		0	0		0
Loans charged against the allowance	0		0	0		0
Balance at end of period	5,412		6,770	5,412		6,770
Allowance for loan losses [Abstract]
Individually evaluated for impairment	0			0			0
Collectively evaluated for impairment	5,412			5,412			5,960
Total ending allowance balance	$ 5,412			$ 5,412			$ 5,960

[1] Credit scores have been updated within the last twelve months.