Loans Receivable, Non-Performing Assets and Impaired Loans (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Loan	Jun. 30, 2012	Jun. 30, 2013 Loan	Jun. 30, 2012	Dec. 31, 2012 Loan
Non-performing assets [Abstract]
Total non-accrual loans	$ 37,537,000		$ 37,537,000		$ 37,495,000
Accruing loans greater than 90 days past due	0		0		0
Foreclosed real-estate	13,297,000		13,297,000		11,441,000
Total non-performing assets	50,834,000		50,834,000		48,936,000
Nonaccrual troubled debt restructures (included above)	5,908,000		5,908,000		5,635,000
Accruing troubled debt restructures	45,851,000		45,851,000		56,448,000
Total non-accrual loans to net loans (in hundredths)	6.00%		6.00%		5.80%
Allowance for loan losses	12,765,000		12,765,000		17,478,000
Allowance to total gross loans receivable (in hundredths)	2.00%		2.00%		2.60%
Allowance for loan losses to total non-performing loans, including loans contractually past due 90 days or more (in hundredths)	34.00%		34.00%		46.60%
Total non-accrual and accruing loans greater than 90 days past due to total assets (in hundredths)	4.50%		4.50%		4.40%
Total non-performing assets to total assets (in hundredths)	6.10%		6.10%		5.70%
Number of loans [Abstract]
Total non-accrual loans	99		99		104
Nonaccrual troubled debt restructures (included above)	35		35		28
Accruing troubled debt restructurings	121		121		119
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	36,884,000		36,884,000		51,828,000
Impaired Loans with Specific Allowance, Related Allowance	4,908,000		4,908,000		7,594,000
Impaired Loans with No Specific Allowance, Recorded Investment	45,559,000		45,559,000		34,794,000
Total Impaired Loans, Recorded Investment	82,443,000	82,443,000	82,443,000	82,443,000
Total Impaired Loans, Unpaid Principal Balance	90,681,000		90,681,000		91,110,000
Impaired Loans with Specific Allowance, Average Recorded Investment	38,980,000	44,228,000	38,924,000	44,294,000
Impaired Loans with Specific Allowance, Interest Income Recognized	364,000	380,000	689,000	758,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	46,407,000	46,554,000	46,392,000	46,923,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	361,000	493,000	695,000	917,000
Total Impaired Loans, Average Recorded Investment	85,387,000	90,782,000	85,316,000	91,217,000
Total Impaired Loans Interest Income Recognized	725,000	873,000	1,384,000	1,675,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period	78,848,000		86,622,000
Added to impaired loans	5,645,000		15,056,000
Gross loans transferred to foreclosed real estate	(642,000)		(5,244,000)
Paid off prior to foreclosure	(1,408,000)		(13,991,000)
Impaired loans at end of period	82,443,000	82,443,000	82,443,000	82,443,000
Interest income on cash basis recognized on impaired loans	689,000		1,384,000
Loans in nonaccrual status included in impaired loans	44,907,000		44,907,000
Impaired loans	82,443,000	82,443,000	82,443,000	82,443,000
Residential Mortgage [Member]
Non-performing assets [Abstract]
Total non-accrual loans	14,393,000		14,393,000		14,436,000
Number of loans [Abstract]
Total non-accrual loans	59		59		46
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	20,340,000		20,340,000		33,300,000
Impaired Loans with Specific Allowance, Related Allowance	2,733,000		2,733,000		4,196,000
Impaired Loans with No Specific Allowance, Recorded Investment	24,256,000		24,256,000		12,918,000
Total Impaired Loans, Recorded Investment	44,596,000		44,596,000
Total Impaired Loans, Unpaid Principal Balance	47,268,000		47,268,000		48,239,000
Impaired Loans with Specific Allowance, Average Recorded Investment	20,702,000	23,486,000	20,802,000	23,528,000
Impaired Loans with Specific Allowance, Interest Income Recognized	206,000	175,000	406,000	371,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	24,609,000	21,273,000	24,411,000	21,318,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	209,000	225,000	381,000	415,000
Total Impaired Loans, Average Recorded Investment	45,311,000	44,759,000	45,213,000	44,846,000
Total Impaired Loans Interest Income Recognized	415,000	400,000	787,000	786,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			46,218,000
Impaired loans at end of period	44,596,000		44,596,000
Impaired loans	44,596,000		44,596,000
Construction A&D [Member]
Non-performing assets [Abstract]
Total non-accrual loans	5,961,000		5,961,000		8,564,000
Number of loans [Abstract]
Total non-accrual loans	6		6		17
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	6,689,000		6,689,000		5,204,000
Impaired Loans with Specific Allowance, Related Allowance	954,000		954,000		1,663,000
Impaired Loans with No Specific Allowance, Recorded Investment	4,230,000		4,230,000		5,799,000
Total Impaired Loans, Recorded Investment	10,919,000		10,919,000
Total Impaired Loans, Unpaid Principal Balance	12,900,000		12,900,000		11,614,000
Impaired Loans with Specific Allowance, Average Recorded Investment	7,577,000	9,543,000	7,103,000	9,557,000
Impaired Loans with Specific Allowance, Interest Income Recognized	42,000	91,000	77,000	166,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	4,670,000	9,042,000	4,792,000	9,338,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	37,000	93,000	79,000	188,000
Total Impaired Loans, Average Recorded Investment	12,247,000	18,585,000	11,895,000	18,895,000
Total Impaired Loans Interest Income Recognized	79,000	184,000	156,000	354,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			11,003,000
Impaired loans at end of period	10,919,000		10,919,000
Impaired loans	10,919,000		10,919,000
Land [Member]
Non-performing assets [Abstract]
Total non-accrual loans	5,615,000		5,615,000		4,688,000
Number of loans [Abstract]
Total non-accrual loans	14		14		13
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	3,889,000		3,889,000		2,583,000
Impaired Loans with Specific Allowance, Related Allowance	463,000		463,000		551,000
Impaired Loans with No Specific Allowance, Recorded Investment	5,397,000		5,397,000		6,370,000
Total Impaired Loans, Recorded Investment	9,286,000		9,286,000
Total Impaired Loans, Unpaid Principal Balance	12,521,000		12,521,000		9,373,000
Impaired Loans with Specific Allowance, Average Recorded Investment	4,724,000	5,038,000	5,000,000	5,042,000
Impaired Loans with Specific Allowance, Interest Income Recognized	47,000	58,000	77,000	112,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	5,399,000	6,187,000	5,402,000	6,190,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	26,000	45,000	63,000	79,000
Total Impaired Loans, Average Recorded Investment	10,123,000	11,225,000	10,402,000	11,232,000
Total Impaired Loans Interest Income Recognized	73,000	103,000	140,000	191,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			8,953,000
Impaired loans at end of period	9,286,000		9,286,000
Impaired loans	9,286,000		9,286,000
Lines of Credit [Member]
Non-performing assets [Abstract]
Total non-accrual loans	1,842,000		1,842,000		1,877,000
Number of loans [Abstract]
Total non-accrual loans	2		2		4
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	169,000		169,000		149,000
Impaired Loans with Specific Allowance, Related Allowance	42,000		42,000		32,000
Impaired Loans with No Specific Allowance, Recorded Investment	1,919,000		1,919,000		1,958,000
Total Impaired Loans, Recorded Investment	2,088,000		2,088,000
Total Impaired Loans, Unpaid Principal Balance	2,091,000		2,091,000		2,119,000
Impaired Loans with Specific Allowance, Average Recorded Investment	169,000	310,000	169,000	310,000
Impaired Loans with Specific Allowance, Interest Income Recognized	3,000	1,000	3,000	1,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	1,920,000	2,657,000	1,920,000	2,657,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	2,000	14,000	5,000	29,000
Total Impaired Loans, Average Recorded Investment	2,089,000	2,967,000	2,089,000	2,967,000
Total Impaired Loans Interest Income Recognized	5,000	15,000	8,000	30,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			2,107,000
Impaired loans at end of period	2,088,000		2,088,000
Impaired loans	2,088,000		2,088,000
Commercial Real Estate [Member]
Non-performing assets [Abstract]
Total non-accrual loans	8,111,000		8,111,000		5,793,000
Number of loans [Abstract]
Total non-accrual loans	10		10		10
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	5,697,000		5,697,000		10,304,000
Impaired Loans with Specific Allowance, Related Allowance	712,000		712,000		975,000
Impaired Loans with No Specific Allowance, Recorded Investment	8,259,000		8,259,000		6,129,000
Total Impaired Loans, Recorded Investment	13,956,000		13,956,000
Total Impaired Loans, Unpaid Principal Balance	14,173,000		14,173,000		16,504,000
Impaired Loans with Specific Allowance, Average Recorded Investment	5,708,000	3,114,000	5,750,000	3,117,000
Impaired Loans with Specific Allowance, Interest Income Recognized	66,000	39,000	125,000	74,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	8,290,000	7,272,000	8,309,000	7,297,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	75,000	116,000	149,000	206,000
Total Impaired Loans, Average Recorded Investment	13,998,000	10,386,000	14,059,000	10,414,000
Total Impaired Loans Interest Income Recognized	141,000	155,000	274,000	280,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			16,433,000
Impaired loans at end of period	13,956,000		13,956,000
Impaired loans	13,956,000		13,956,000
Commercial Non-Real Estate [Member]
Non-performing assets [Abstract]
Total non-accrual loans	0		0		111,000
Number of loans [Abstract]
Total non-accrual loans	0		0		3
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	0		0		5,000
Impaired Loans with Specific Allowance, Related Allowance	0		0		5,000
Impaired Loans with No Specific Allowance, Recorded Investment	0		0		103,000
Total Impaired Loans, Recorded Investment	0		0
Total Impaired Loans, Unpaid Principal Balance	99,000		99,000		138,000
Impaired Loans with Specific Allowance, Average Recorded Investment	0	133,000	0	135,000
Impaired Loans with Specific Allowance, Interest Income Recognized	0	0	0	0
Impaired Loans with No Specific Allowance, Average Recorded Investment	0	0	33,000	0
Impaired Loans with No Specific Allowance, Interest Income Recognized	0	0	0	0
Total Impaired Loans, Average Recorded Investment	0	133,000	33,000	135,000
Total Impaired Loans Interest Income Recognized	0	0	0	0
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			108,000
Impaired loans at end of period	0		0
Impaired loans	0		0
Home Equity [Member]
Non-performing assets [Abstract]
Total non-accrual loans	1,598,000		1,598,000		2,000,000
Number of loans [Abstract]
Total non-accrual loans	7		7		9
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	100,000		100,000		259,000
Impaired Loans with Specific Allowance, Related Allowance	4,000		4,000		160,000
Impaired Loans with No Specific Allowance, Recorded Investment	1,498,000		1,498,000		1,517,000
Total Impaired Loans, Recorded Investment	1,598,000		1,598,000
Total Impaired Loans, Unpaid Principal Balance	1,629,000		1,629,000		3,100,000
Impaired Loans with Specific Allowance, Average Recorded Investment	100,000	2,584,000	100,000	2,585,000
Impaired Loans with Specific Allowance, Interest Income Recognized	0	16,000	1,000	34,000
Impaired Loans with No Specific Allowance, Average Recorded Investment	1,519,000	99,000	1,525,000	99,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	12,000	0	18,000	0
Total Impaired Loans, Average Recorded Investment	1,619,000	2,683,000	1,625,000	2,684,000
Total Impaired Loans Interest Income Recognized	12,000	16,000	19,000	34,000
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			1,776,000
Impaired loans at end of period	1,598,000		1,598,000
Impaired loans	1,598,000		1,598,000
Consumer [Member]
Non-performing assets [Abstract]
Total non-accrual loans	17,000		17,000		26,000
Number of loans [Abstract]
Total non-accrual loans	1		1		2
Impaired loans [Abstract]
Impaired Loans with Specific Allowance, Recorded Investment	0		0		24,000
Impaired Loans with Specific Allowance, Related Allowance	0		0		12,000
Impaired Loans with No Specific Allowance, Recorded Investment	0		0		0
Total Impaired Loans, Recorded Investment	0		0
Total Impaired Loans, Unpaid Principal Balance	0		0		23,000
Impaired Loans with Specific Allowance, Average Recorded Investment	0	20,000	0	20,000
Impaired Loans with Specific Allowance, Interest Income Recognized	0	0	0	0
Impaired Loans with No Specific Allowance, Average Recorded Investment	0	24,000	0	24,000
Impaired Loans with No Specific Allowance, Interest Income Recognized	0	0	0	0
Total Impaired Loans, Average Recorded Investment	0	44,000	0	44,000
Total Impaired Loans Interest Income Recognized	0	0	0	0
Changes in impaired loans [Roll Forward]
Impaired loans at beginning of period			24,000
Impaired loans at end of period	0		0
Impaired loans	0		0
Consumer Residential Real Estate [Member]
Impaired loans [Abstract]
Total Impaired Loans, Recorded Investment	36,312,000		36,312,000
Changes in impaired loans [Roll Forward]
Impaired loans at end of period	36,312,000		36,312,000
Impaired loans	36,312,000		36,312,000
Builders Residential Real Estate [Member]
Impaired loans [Abstract]
Total Impaired Loans, Recorded Investment	8,284,000		8,284,000
Changes in impaired loans [Roll Forward]
Impaired loans at end of period	8,284,000		8,284,000
Impaired loans	$ 8,284,000		$ 8,284,000