Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	$ 14,954	$ 17,410	$ 14,532	$ 16,870
Charge-offs	(1,021)	(1,245)	(1,712)	(2,232)
Recoveries	115	389	223	903
Provision	137	1,797	1,142	2,810
Allowance for Credit Losses, Ending Balance	14,185	18,351	14,185	18,351
Ending balance
Individually evaluated for impairment	1,533		1,533		1,760
Collectively evaluated for impairment	12,652		12,652		12,772
Portfolio Balances:
Collectively evaluated for impairment	12,652		12,652		12,772
Individually evaluated for impairment	1,533		1,533		1,760
Ending balance	599,605		599,605		639,177
With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	1,777		1,777		2,803
Portfolio Balances:
Individually evaluated for impairment	1,777		1,777		2,803
With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	25,343		25,343		21,913
Portfolio Balances:
Individually evaluated for impairment	25,343		25,343		21,913
Construction [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	428	164	35	166
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	126	(139)	519	(141)
Allowance for Credit Losses, Ending Balance	554	25	554	25
Ending balance
Individually evaluated for impairment	4		4		3
Collectively evaluated for impairment	550		550		32
Portfolio Balances:
Collectively evaluated for impairment	550		550		32
Individually evaluated for impairment	4		4		3
Ending balance	24,606		24,606		23,876
Construction [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	0		0		0
Portfolio Balances:
Individually evaluated for impairment	0		0		0
Construction [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	17		17		19
Portfolio Balances:
Individually evaluated for impairment	17		17		19
Consumer [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	48	278	80	246
Charge-offs	(2)	(55)	(2)	(57)
Recoveries	1	1	1	2
Provision	2	(110)	(30)	(77)
Allowance for Credit Losses, Ending Balance	49	114	49	114
Ending balance
Individually evaluated for impairment	18		18		41
Collectively evaluated for impairment	31		31		39
Portfolio Balances:
Collectively evaluated for impairment	31		31		39
Individually evaluated for impairment	18		18		41
Ending balance	3,922		3,922		3,530
Consumer [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	0		0		0
Portfolio Balances:
Individually evaluated for impairment	0		0		0
Consumer [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	259		259		128
Portfolio Balances:
Individually evaluated for impairment	259		259		128
Multi-Family [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	1,548	2,355	2,484	2,860
Charge-offs	0	(33)	(11)	(33)
Recoveries	1	110	9	116
Provision	139	501	(794)	(10)
Allowance for Credit Losses, Ending Balance	1,688	2,933	1,688	2,933
Ending balance
Individually evaluated for impairment	406		406		426
Collectively evaluated for impairment	1,282		1,282		2,058
Portfolio Balances:
Collectively evaluated for impairment	1,282		1,282		2,058
Individually evaluated for impairment	406		406		426
Ending balance	76,551		76,551		87,930
Multi-Family [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	0		0		51
Portfolio Balances:
Individually evaluated for impairment	0		0		51
Multi-Family [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	4,588		4,588		4,633
Portfolio Balances:
Individually evaluated for impairment	4,588		4,588		4,633
Land, Farmland, Ag Loans [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	1,043	782	554	849
Charge-offs	(356)	(107)	(356)	(107)
Recoveries	2	9	3	204
Provision	79	(56)	567	(318)
Allowance for Credit Losses, Ending Balance	768	628	768	628
Ending balance
Individually evaluated for impairment	25		25		208
Collectively evaluated for impairment	743		743		346
Portfolio Balances:
Collectively evaluated for impairment	743		743		346
Individually evaluated for impairment	25		25		208
Ending balance	16,483		16,483		17,822
Land, Farmland, Ag Loans [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	666		666		0
Portfolio Balances:
Individually evaluated for impairment	666		666		0
Land, Farmland, Ag Loans [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	238		238		1,203
Portfolio Balances:
Individually evaluated for impairment	238		238		1,203
Residential [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	6,966	7,962	8,277	8,050
Charge-offs	(593)	(737)	(1,227)	(1,447)
Recoveries	60	248	110	383
Provision	(37)	1,501	(764)	1,988
Allowance for Credit Losses, Ending Balance	6,396	8,974	6,396	8,974
Ending balance
Individually evaluated for impairment	481		481		720
Collectively evaluated for impairment	5,915		5,915		7,557
Portfolio Balances:
Collectively evaluated for impairment	5,915		5,915		7,557
Individually evaluated for impairment	481		481		720
Ending balance	297,186		297,186		317,924
Residential [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	507		507		1,945
Portfolio Balances:
Individually evaluated for impairment	507		507		1,945
Residential [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	11,651		11,651		8,922
Portfolio Balances:
Individually evaluated for impairment	11,651		11,651		8,922
Commercial & Non-Residential [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	4,356	5,428	2,565	3,638
Charge-offs	(65)	(313)	(65)	(579)
Recoveries	26	21	36	109
Provision	(199)	(34)	1,582	1,934
Allowance for Credit Losses, Ending Balance	4,118	5,102	4,118	5,102
Ending balance
Individually evaluated for impairment	540		540		335
Collectively evaluated for impairment	3,578		3,578		2,230
Portfolio Balances:
Collectively evaluated for impairment	3,578		3,578		2,230
Individually evaluated for impairment	540		540		335
Ending balance	15,888		15,888		163,764
Commercial & Non-Residential [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	504		504		695
Portfolio Balances:
Individually evaluated for impairment	504		504		695
Commercial & Non-Residential [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	8,232		8,232		6,612
Portfolio Balances:
Individually evaluated for impairment	8,232		8,232		6,612
Commercial and Industrial [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	565	441	537	1,061
Charge-offs	(5)	0	(51)	(9)
Recoveries	25	0	64	89
Provision	27	134	62	(566)
Allowance for Credit Losses, Ending Balance	612	575	612	575
Ending balance
Individually evaluated for impairment	59		59		27
Collectively evaluated for impairment	553		553		510
Portfolio Balances:
Collectively evaluated for impairment	553		553		510
Individually evaluated for impairment	59		59		27
Ending balance	36,161		36,161		38,863
Commercial and Industrial [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	100		100		112
Portfolio Balances:
Individually evaluated for impairment	100		100		112
Commercial and Industrial [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	358		358		396
Portfolio Balances:
Individually evaluated for impairment	358		358		396
Portfolio Balance [Member]
Ending balance
Collectively evaluated for impairment	586,670		586,670		628,993
Portfolio Balances:
Collectively evaluated for impairment	586,670		586,670		628,993
Portfolio Balance [Member] | Construction [Member]
Ending balance
Collectively evaluated for impairment	24,589		24,589		23,857
Portfolio Balances:
Collectively evaluated for impairment	24,589		24,589		23,857
Portfolio Balance [Member] | Consumer [Member]
Ending balance
Collectively evaluated for impairment	3,663		3,663		3,402
Portfolio Balances:
Collectively evaluated for impairment	3,663		3,663		3,402
Portfolio Balance [Member] | Multi-Family [Member]
Ending balance
Collectively evaluated for impairment	71,963		71,963		83,246
Portfolio Balances:
Collectively evaluated for impairment	71,963		71,963		83,246
Portfolio Balance [Member] | Land, Farmland, Ag Loans [Member]
Ending balance
Collectively evaluated for impairment	15,579		15,579		16,619
Portfolio Balances:
Collectively evaluated for impairment	15,579		15,579		16,619
Portfolio Balance [Member] | Residential [Member]
Ending balance
Collectively evaluated for impairment	285,028		285,028		307,057
Portfolio Balances:
Collectively evaluated for impairment	285,028		285,028		307,057
Portfolio Balance [Member] | Commercial & Non-Residential [Member]
Ending balance
Collectively evaluated for impairment	150,145		150,145		156,457
Portfolio Balances:
Collectively evaluated for impairment	150,145		150,145		156,457
Portfolio Balance [Member] | Commercial and Industrial [Member]
Ending balance
Collectively evaluated for impairment	35,703		35,703		38,355
Portfolio Balances:
Collectively evaluated for impairment	$ 35,703		$ 35,703		$ 38,355