Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	$ 14,185	$ 18,351	$ 14,532	$ 16,870
Charge-offs	(855)	(1,134)	(2,567)	(3,366)
Recoveries	721	170	944	1,073
Provision	457	228	1,599	3,038
Allowance for Credit Losses, Ending Balance	14,508	17,615	14,508	17,615
Ending balance
Individually evaluated for impairment	1,699		1,699		1,760
Collectively evaluated for impairment	12,809		12,809		12,772
Portfolio Balances:
Collectively evaluated for impairment	12,809		12,809		12,772
Individually evaluated for impairment	1,699		1,699		1,760
Ending balance	579,522		579,522		639,177
With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	1,798		1,798		2,803
Portfolio Balances:
Individually evaluated for impairment	1,798		1,798		2,803
With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	23,273		23,273		21,913
Portfolio Balances:
Individually evaluated for impairment	23,273		23,273		21,913
Construction [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	554	25	35	166
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(17)	(1)	502	(142)
Allowance for Credit Losses, Ending Balance	537	24	537	24
Ending balance
Individually evaluated for impairment	1		1		3
Collectively evaluated for impairment	537		537		32
Portfolio Balances:
Collectively evaluated for impairment	537		537		32
Individually evaluated for impairment	1		1		3
Ending balance	29,651		29,651		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	16		16		19
Portfolio Balances:
Individually evaluated for impairment	16		16		19
Consumer [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	49	114	80	246
Charge-offs	(128)	(3)	(130)	(60)
Recoveries	16	1	17	3
Provision	164	11	134	(66)
Allowance for Credit Losses, Ending Balance	101	123	101	123
Ending balance
Individually evaluated for impairment	39		39		41
Collectively evaluated for impairment	62		62		39
Portfolio Balances:
Collectively evaluated for impairment	62		62		39
Individually evaluated for impairment	39		39		41
Ending balance	4,076		4,076		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	526		526		128
Portfolio Balances:
Individually evaluated for impairment	526		526		128
Multi-Family [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	1,688	2,933	2,484	2,860
Charge-offs	0	(52)	(11)	(85)
Recoveries	0	40	9	156
Provision	385	123	(409)	113
Allowance for Credit Losses, Ending Balance	2,073	3,044	2,073	3,044
Ending balance
Individually evaluated for impairment	406		406		426
Collectively evaluated for impairment	1,666		1,666		2,058
Portfolio Balances:
Collectively evaluated for impairment	1,666		1,666		2,058
Individually evaluated for impairment	406		406		426
Ending balance	72,737		72,737		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	4,565		4,565		4,633
Portfolio Balances:
Individually evaluated for impairment	4,565		4,565		4,633
Land, Farmland, Ag Loans [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	768	628	554	849
Charge-offs	(2)	0	(358)	(107)
Recoveries	2	6	5	210
Provision	(294)	135	273	(183)
Allowance for Credit Losses, Ending Balance	474	769	474	769
Ending balance
Individually evaluated for impairment	100		100		208
Collectively evaluated for impairment	374		374		346
Portfolio Balances:
Collectively evaluated for impairment	374		374		346
Individually evaluated for impairment	100		100		208
Ending balance	14,141		14,141		17,822
Land, Farmland, Ag Loans [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	0		0		0
Portfolio Balances:
Individually evaluated for impairment	0		0		0
Land, Farmland, Ag Loans [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	900		900		1,203
Portfolio Balances:
Individually evaluated for impairment	900		900		1,203
Residential [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	6,396	8,974	8,277	8,050
Charge-offs	(704)	(553)	(1,931)	(2,000)
Recoveries	54	105	164	488
Provision	596	432	(168)	2,420
Allowance for Credit Losses, Ending Balance	6,342	8,958	6,342	8,958
Ending balance
Individually evaluated for impairment	595		595		720
Collectively evaluated for impairment	5,747		5,747		7,557
Portfolio Balances:
Collectively evaluated for impairment	5,747		5,747		7,557
Individually evaluated for impairment	595		595		720
Ending balance	284,094		284,094		317,924
Residential [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	589		589		1,945
Portfolio Balances:
Individually evaluated for impairment	589		589		1,945
Residential [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	10,825		10,825		8,922
Portfolio Balances:
Individually evaluated for impairment	10,825		10,825		8,922
Commercial & Non-Residential [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	4,118	5,102	2,565	3,638
Charge-offs	(14)	(487)	(79)	(1,066)
Recoveries	648	9	684	118
Provision	(1,176)	(539)	406	1,395
Allowance for Credit Losses, Ending Balance	3,576	4,085	3,576	4,085
Ending balance
Individually evaluated for impairment	524		524		335
Collectively evaluated for impairment	3,052		3,052		2,230
Portfolio Balances:
Collectively evaluated for impairment	3,052		3,052		2,230
Individually evaluated for impairment	524		524		335
Ending balance	150,681		150,681		163,764
Commercial & Non-Residential [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	1,143		1,143		695
Portfolio Balances:
Individually evaluated for impairment	1,143		1,143		695
Commercial & Non-Residential [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	5,949		5,949		6,612
Portfolio Balances:
Individually evaluated for impairment	5,949		5,949		6,612
Commercial and industrial [Member]
Allowance for credit losses:
Allowance for Credit Losses, Beginning Balance	612	575	537	1,061
Charge-offs	(7)	(39)	(58)	(48)
Recoveries	1	9	65	98
Provision	799	67	861	(499)
Allowance for Credit Losses, Ending Balance	1,405	612	1,405	612
Ending balance
Individually evaluated for impairment	34		34		27
Collectively evaluated for impairment	1,371		1,371		510
Portfolio Balances:
Collectively evaluated for impairment	1,371		1,371		510
Individually evaluated for impairment	34		34		27
Ending balance	38,650		38,650		38,863
Commercial and industrial [Member] | With No Related Allowance [Member]
Ending balance
Individually evaluated for impairment	66		66		112
Portfolio Balances:
Individually evaluated for impairment	66		66		112
Commercial and industrial [Member] | With Related Allowance [Member]
Ending balance
Individually evaluated for impairment	492		492		396
Portfolio Balances:
Individually evaluated for impairment	492		492		396
Portfolio Balance [Member]
Ending balance
Collectively evaluated for impairment	568,959		568,959		628,993
Portfolio Balances:
Collectively evaluated for impairment	568,959		568,959		628,993
Portfolio Balance [Member] | Construction [Member]
Ending balance
Collectively evaluated for impairment	29,635		29,635		23,857
Portfolio Balances:
Collectively evaluated for impairment	29,635		29,635		23,857
Portfolio Balance [Member] | Consumer [Member]
Ending balance
Collectively evaluated for impairment	3,550		3,550		3,402
Portfolio Balances:
Collectively evaluated for impairment	3,550		3,550		3,402
Portfolio Balance [Member] | Multi-Family [Member]
Ending balance
Collectively evaluated for impairment	68,172		68,172		83,246
Portfolio Balances:
Collectively evaluated for impairment	68,172		68,172		83,246
Portfolio Balance [Member] | Land, Farmland, Ag Loans [Member]
Ending balance
Collectively evaluated for impairment	13,241		13,241		16,619
Portfolio Balances:
Collectively evaluated for impairment	13,241		13,241		16,619
Portfolio Balance [Member] | Residential [Member]
Ending balance
Collectively evaluated for impairment	272,680		272,680		307,057
Portfolio Balances:
Collectively evaluated for impairment	272,680		272,680		307,057
Portfolio Balance [Member] | Commercial & Non-Residential [Member]
Ending balance
Collectively evaluated for impairment	143,589		143,589		156,457
Portfolio Balances:
Collectively evaluated for impairment	143,589		143,589		156,457
Portfolio Balance [Member] | Commercial and industrial [Member]
Ending balance
Collectively evaluated for impairment	38,092		38,092		38,355
Portfolio Balances:
Collectively evaluated for impairment	$ 38,092		$ 38,092		$ 38,355