Loans Receivable, Non-Performing Assets and Impaired Loans (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Non-performing assets [Abstract]
Total non-accrual loans	$ 37,495,000	$ 31,432,000
Accruing loans greater than 90 days past due	0	0
Foreclosed real-estate	11,441,000	19,932,000	[1]	20,955,000	21,574,000
Total non-performing assets	48,936,000	51,364,000
Nonaccrual troubled debt restructures (included above)	5,635,000	19,351,000
Accruing troubled debt restructurings	56,448,000	40,424,000
Total non-accrual loans to net loans (in hundredths)	5.80%	4.50%
Allowance for loan losses	17,478,000	25,938,000	[1]
Allowance to total loans (in hundredths)	2.60%	3.60%
Allowance for loan losses to total non-performing loans, including loans contractually past due 90 days or more (in hundredths)	46.60%	82.50%
Total non-accrual and accruing loans greater than 90 days past due to total assets (in hundredths)	4.40%	3.50%
Total non-performing assets to total assets (in hundredths)	5.70%	5.70%
Number of loans [Abstract]
Total non-accrual loans	104	67
Nonaccrual troubled debt restructures (included above)	28	38
Accruing troubled debt restructurings	119	77
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	51,828,000	56,049,000
Impaired Loans with Specific Allowance, Related Allowance	7,594,000	12,994,000
Impaired Loans with No Specific Allowance, Recorded Investment	34,794,000	74,225,000
Total Impaired Loans, Recorded Investment	86,622,000	130,274,000		120,910,000
Total Impaired Loans, Unpaid Principal Balance	91,110,000	127,279,000
Impaired Loans with Specific Allowance, Average Recorded Investment	53,638,000	57,677,000
Impaired Loans with Specific Allowance, Interest Income Recognized	2,331,000	2,453,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	38,518,000	78,207,000
Impaired Loans with No Related Allowance, Interest Income Recognized	1,220,000	3,490,000
Total Impaired Loans, Average Recorded Investment	92,156,000	135,884,000		126,058,000
Total Impaired Loans Interest Income Recognized	3,551,000	5,943,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	130,274,000	120,910,000
Added to impaired loans	23,272,000	53,134,000
Gross loans transferred to foreclosed real estate	(16,515,000)	(19,820,000)
Transferred out of impaired loans	(50,409,000)	(23,950,000)
Impaired loans at end of period	86,622,000	130,274,000		120,910,000
Loans in nonaccrual status included in impaired loans	53,732,000
Impaired loans	86,622,000	130,274,000		120,910,000
Impaired loans with specific allowance	51,828,000	56,049,000
Interest income on cash basis recognized on impaired loans	3,551,000	5,943,000		6,893,000
Non-accrual loans, not included in impaired	4,605,000
Number of non-accrual loans, not included in impaired	11
Residential Mortgage [Member]
Non-performing assets [Abstract]
Total non-accrual loans	14,436,000	8,912,000
Number of loans [Abstract]
Total non-accrual loans	46	25
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	33,300,000	26,736,000
Impaired Loans with Specific Allowance, Related Allowance	4,196,000	5,509,000
Impaired Loans with No Specific Allowance, Recorded Investment	12,918,000	24,271,000
Total Impaired Loans, Recorded Investment	46,218,000	51,007,000
Total Impaired Loans, Unpaid Principal Balance	48,239,000	50,310,000
Impaired Loans with Specific Allowance, Average Recorded Investment	33,864,000	26,826,000
Impaired Loans with Specific Allowance, Interest Income Recognized	1,415,000	1,080,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	13,747,000	25,659,000
Impaired Loans with No Related Allowance, Interest Income Recognized	516,000	1,201,000
Total Impaired Loans, Average Recorded Investment	47,611,000	52,485,000
Total Impaired Loans Interest Income Recognized	1,931,000	2,281,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	51,007,000
Impaired loans at end of period	46,218,000	51,007,000
Impaired loans	46,218,000	51,007,000
Acquisition and Development [Member]
Non-performing assets [Abstract]
Total non-accrual loans	8,564,000	10,997,000
Number of loans [Abstract]
Total non-accrual loans	17	11
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	5,204,000	18,023,000
Impaired Loans with Specific Allowance, Related Allowance	1,663,000	2,624,000
Impaired Loans with No Specific Allowance, Recorded Investment	5,799,000	17,375,000
Total Impaired Loans, Recorded Investment	11,003,000	35,398,000
Total Impaired Loans, Unpaid Principal Balance	11,614,000	34,535,000
Impaired Loans with Specific Allowance, Average Recorded Investment	5,660,000	19,968,000
Impaired Loans with Specific Allowance, Interest Income Recognized	211,000	793,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	7,224,000	19,199,000
Impaired Loans with No Related Allowance, Interest Income Recognized	210,000	696,000
Total Impaired Loans, Average Recorded Investment	12,884,000	39,167,000
Total Impaired Loans Interest Income Recognized	421,000	1,489,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	35,398,000
Impaired loans at end of period	11,003,000	35,398,000
Impaired loans	11,003,000	35,398,000
Land [Member]
Non-performing assets [Abstract]
Total non-accrual loans	4,688,000	6,813,000
Number of loans [Abstract]
Total non-accrual loans	13	14
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	2,583,000	2,850,000
Impaired Loans with Specific Allowance, Related Allowance	551,000	1,365,000
Impaired Loans with No Specific Allowance, Recorded Investment	6,370,000	8,534,000
Total Impaired Loans, Recorded Investment	8,953,000	11,384,000
Total Impaired Loans, Unpaid Principal Balance	9,373,000	9,949,000
Impaired Loans with Specific Allowance, Average Recorded Investment	3,207,000	3,770,000
Impaired Loans with Specific Allowance, Interest Income Recognized	138,000	236,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	7,725,000	9,143,000
Impaired Loans with No Related Allowance, Interest Income Recognized	144,000	261,000
Total Impaired Loans, Average Recorded Investment	10,932,000	12,913,000
Total Impaired Loans Interest Income Recognized	282,000	497,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	11,384,000
Impaired loans at end of period	8,953,000	11,384,000
Impaired loans	8,953,000	11,384,000
Lines of Credit [Member]
Non-performing assets [Abstract]
Total non-accrual loans	1,877,000	2,019,000
Number of loans [Abstract]
Total non-accrual loans	4	4
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	149,000	1,548,000
Impaired Loans with Specific Allowance, Related Allowance	32,000	510,000
Impaired Loans with No Specific Allowance, Recorded Investment	1,958,000	4,187,000
Total Impaired Loans, Recorded Investment	2,107,000	5,735,000
Total Impaired Loans, Unpaid Principal Balance	2,119,000	5,735,000
Impaired Loans with Specific Allowance, Average Recorded Investment	149,000	590,000
Impaired Loans with Specific Allowance, Interest Income Recognized	7,000	87,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	1,961,000	4,187,000
Impaired Loans with No Related Allowance, Interest Income Recognized	6,000	143,000
Total Impaired Loans, Average Recorded Investment	2,110,000	4,777,000
Total Impaired Loans Interest Income Recognized	13,000	230,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	5,735,000
Impaired loans at end of period	2,107,000	5,735,000
Impaired loans	2,107,000	5,735,000
Commercial Real Estate [Member]
Non-performing assets [Abstract]
Total non-accrual loans	5,793,000	2,140,000
Number of loans [Abstract]
Total non-accrual loans	10	5
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	10,304,000	4,694,000
Impaired Loans with Specific Allowance, Related Allowance	975,000	960,000
Impaired Loans with No Specific Allowance, Recorded Investment	6,129,000	19,660,000
Total Impaired Loans, Recorded Investment	16,433,000	24,354,000
Total Impaired Loans, Unpaid Principal Balance	16,504,000	24,354,000
Impaired Loans with Specific Allowance, Average Recorded Investment	10,450,000	4,723,000
Impaired Loans with Specific Allowance, Interest Income Recognized	556,000	191,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	6,236,000	19,821,000
Impaired Loans with No Related Allowance, Interest Income Recognized	305,000	1,185,000
Total Impaired Loans, Average Recorded Investment	16,686,000	24,544,000
Total Impaired Loans Interest Income Recognized	861,000	1,376,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	24,354,000
Impaired loans at end of period	16,433,000	24,354,000
Impaired loans	16,433,000	24,354,000
Commercial Non-Real Estate [Member]
Non-performing assets [Abstract]
Total non-accrual loans	111,000	5,000
Number of loans [Abstract]
Total non-accrual loans	3	1
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	5,000	28,000
Impaired Loans with Specific Allowance, Related Allowance	5,000	28,000
Impaired Loans with No Specific Allowance, Recorded Investment	103,000	4,000
Total Impaired Loans, Recorded Investment	108,000	32,000
Total Impaired Loans, Unpaid Principal Balance	138,000	32,000
Impaired Loans with Specific Allowance, Average Recorded Investment	26,000	28,000
Impaired Loans with Specific Allowance, Interest Income Recognized	0	0
Impaired Loans with No Specific Allowance, Average Recorded Investment	106,000	5,000
Impaired Loans with No Related Allowance, Interest Income Recognized	0	0
Total Impaired Loans, Average Recorded Investment	132,000	33,000
Total Impaired Loans Interest Income Recognized	0	0
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	32,000
Impaired loans at end of period	108,000	32,000
Impaired loans	108,000	32,000
Home Equity [Member]
Non-performing assets [Abstract]
Total non-accrual loans	2,000,000	343,000
Number of loans [Abstract]
Total non-accrual loans	9	3
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	259,000	2,170,000
Impaired Loans with Specific Allowance, Related Allowance	160,000	1,998,000
Impaired Loans with No Specific Allowance, Recorded Investment	1,517,000	170,000
Total Impaired Loans, Recorded Investment	1,776,000	2,340,000
Total Impaired Loans, Unpaid Principal Balance	3,100,000	2,340,000
Impaired Loans with Specific Allowance, Average Recorded Investment	259,000	1,772,000
Impaired Loans with Specific Allowance, Interest Income Recognized	4,000	66,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	1,519,000	170,000
Impaired Loans with No Related Allowance, Interest Income Recognized	39,000	4,000
Total Impaired Loans, Average Recorded Investment	1,778,000	1,942,000
Total Impaired Loans Interest Income Recognized	43,000	70,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	2,340,000
Impaired loans at end of period	1,776,000	2,340,000
Impaired loans	1,776,000	2,340,000
Consumer [Member]
Non-performing assets [Abstract]
Total non-accrual loans	26,000	203,000
Number of loans [Abstract]
Total non-accrual loans	2	4
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	24,000	0
Impaired Loans with Specific Allowance, Related Allowance	12,000	0
Impaired Loans with No Specific Allowance, Recorded Investment	0	24,000
Total Impaired Loans, Recorded Investment	24,000	24,000
Total Impaired Loans, Unpaid Principal Balance	23,000	24,000
Impaired Loans with Specific Allowance, Average Recorded Investment	23,000	0
Impaired Loans with Specific Allowance, Interest Income Recognized	0	0
Impaired Loans with No Specific Allowance, Average Recorded Investment	0	23,000
Impaired Loans with No Related Allowance, Interest Income Recognized	0	0
Total Impaired Loans, Average Recorded Investment	23,000	23,000
Total Impaired Loans Interest Income Recognized	0	0
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	24,000
Impaired loans at end of period	24,000	24,000
Impaired loans	24,000	24,000
Consumer Residential Real Estate [Member]
Impaired loans [Abstract]
Total Impaired Loans, Recorded Investment	35,660,000
Changes in impaired loans [Roll Forward]
Impaired loans at end of period	35,660,000
Impaired loans	35,660,000
Builders Residential Real Estate [Member]
Impaired loans [Abstract]
Total Impaired Loans, Recorded Investment	10,558,000
Changes in impaired loans [Roll Forward]
Impaired loans at end of period	10,558,000
Impaired loans	$ 10,558,000

[1] Restated