Loans Receivable, Troubled Debt Restructurings (Details) (USD $)																																																							3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Residential mortgage [Member]	Dec. 31, 2011 Residential mortgage [Member]	Sep. 30, 2012 Acquisition and Development [Member]	Dec. 31, 2011 Acquisition and Development [Member]	Sep. 30, 2012 Land [Member]	Dec. 31, 2011 Land [Member]	Sep. 30, 2012 Lines of credit [Member]	Dec. 31, 2011 Lines of credit [Member]	Sep. 30, 2012 Commercial real estate [Member]	Dec. 31, 2011 Commercial real estate [Member]	Sep. 30, 2012 Commercial non-real estate [Member]	Dec. 31, 2011 Commercial non-real estate [Member]	Sep. 30, 2012 Home equity [Member]	Dec. 31, 2011 Home equity [Member]	Sep. 30, 2012 Consumer [Member]	Dec. 31, 2011 Consumer [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Residential mortgage [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Residential mortgage [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Acquisition and Development [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Acquisition and Development [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Land [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Land [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Lines of credit [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Lines of credit [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Commercial real estate [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Commercial real estate [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Commercial non-real estate [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Commercial non-real estate [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Home equity [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Home equity [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member] Consumer [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member] Consumer [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Residential mortgage [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Residential mortgage [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Acquisition and Development [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Acquisition and Development [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Land [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Land [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Lines of credit [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Lines of credit [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Commercial real estate [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Commercial real estate [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Commercial non-real estate [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Commercial non-real estate [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Home equity [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Home equity [Member]	Sep. 30, 2012 Troubled Debt Restructurings That Subsequently Defaulted [Member] Consumer [Member]	Dec. 31, 2011 Troubled Debt Restructurings That Subsequently Defaulted [Member] Consumer [Member]	Sep. 30, 2012 Pre-Modification [Member]	Sep. 30, 2012 Pre-Modification [Member]	Sep. 30, 2012 Pre-Modification [Member] Residential mortgage [Member]	Sep. 30, 2012 Pre-Modification [Member] Residential mortgage [Member]	Sep. 30, 2012 Pre-Modification [Member] Acquisition and Development [Member]	Sep. 30, 2012 Pre-Modification [Member] Acquisition and Development [Member]	Sep. 30, 2012 Pre-Modification [Member] Land [Member]	Sep. 30, 2012 Pre-Modification [Member] Land [Member]	Sep. 30, 2012 Pre-Modification [Member] Lines of credit [Member]	Sep. 30, 2012 Pre-Modification [Member] Lines of credit [Member]	Sep. 30, 2012 Pre-Modification [Member] Commercial real estate [Member]	Sep. 30, 2012 Pre-Modification [Member] Commercial real estate [Member]	Sep. 30, 2012 Pre-Modification [Member] Commercial non-real estate [Member]	Sep. 30, 2012 Pre-Modification [Member] Commercial non-real estate [Member]	Sep. 30, 2012 Pre-Modification [Member] Home equity [Member]	Sep. 30, 2012 Pre-Modification [Member] Home equity [Member]	Sep. 30, 2012 Pre-Modification [Member] Consumer [Member]	Sep. 30, 2012 Pre-Modification [Member] Consumer [Member]	Sep. 30, 2012 Post Modification [Member]	Sep. 30, 2012 Post Modification [Member]	Sep. 30, 2012 Post Modification [Member] Residential mortgage [Member]	Sep. 30, 2012 Post Modification [Member] Residential mortgage [Member]	Sep. 30, 2012 Post Modification [Member] Acquisition and Development [Member]	Sep. 30, 2012 Post Modification [Member] Acquisition and Development [Member]	Sep. 30, 2012 Post Modification [Member] Land [Member]	Sep. 30, 2012 Post Modification [Member] Land [Member]	Sep. 30, 2012 Post Modification [Member] Lines of credit [Member]	Sep. 30, 2012 Post Modification [Member] Lines of credit [Member]	Sep. 30, 2012 Post Modification [Member] Commercial real estate [Member]	Sep. 30, 2012 Post Modification [Member] Commercial real estate [Member]	Sep. 30, 2012 Post Modification [Member] Commercial non-real estate [Member]	Sep. 30, 2012 Post Modification [Member] Commercial non-real estate [Member]	Sep. 30, 2012 Post Modification [Member] Home equity [Member]	Sep. 30, 2012 Post Modification [Member] Home equity [Member]	Sep. 30, 2012 Post Modification [Member] Consumer [Member]	Sep. 30, 2012 Post Modification [Member] Consumer [Member]
Troubled debt restructuring [Abstract]
Number of Contracts	106	77																	120	95	79	68	8	8	16	9	4	2	12	8	0	0	1	0	0	0	21	20	17	14	1	1	2	3	1	1	0	1	0	0	0	0	0	0
Pre-Modification Outstanding Recorded Investment																			$ 67,079,000	$ 54,056,000	$ 31,884,000	$ 30,372,000	$ 13,214,000	$ 11,152,000	$ 5,929,000	$ 3,985,000	$ 593,000	$ 332,000	$ 15,359,000	$ 8,215,000	$ 0	$ 0	$ 100,000	$ 0	$ 0	$ 0	$ 7,872,000	$ 7,550,000	$ 5,447,000	$ 4,568,000	$ 1,830,000	$ 2,090,000	$ 455,000	$ 464,000	$ 140,000	$ 140,000	$ 0	$ 288,000	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment																			56,076,000	52,255,000	29,877,000	29,815,000	11,595,000	10,260,000	5,215,000	3,802,000	593,000	332,000	8,696,000	8,046,000	0	0	100,000	0	0	0	7,728,000	7,520,000	5,316,000	4,542,000	1,830,000	2,090,000	442,000	462,000	140,000	140,000	0	286,000	0	0	0	0	0	0
Newly restructured loans during the period [Abstract]
Term Modification																																																							0	1,539,000	0	659,000	0	0	0	176,000	0	0	0	704,000	0	0	0	0	0	0	0	1,522,000	0	657,000	0	0	0	176,000	0	0	0	689,000	0	0	0	0	0	0
Contracts																																																							0	7	0	3	0	0	0	1	0	0	0	3	0	0	0	0	0	0	0	7	0	3	0	0	0	1	0	0	0	3	0	0	0	0	0	0
Combination Modifications																																																							13,614,000	20,237,000	258,000	6,347,000	0	0	282,000	816,000	0	0	13,074,000	13,074,000	0	0	0	0	0	0	7,070,000	13,554,000	258,000	6,215,000	0	0	282,000	809,000	0	0	6,530,000	6,530,000	0	0	0	0	0	0
Contracts																																																							6	24	2	17	0	0	1	4	0	0	3	3	0	0	0	0	0	0	6	24	2	17	0	0	1	4	0	0	3	3	0	0	0	0	0	0
Total																																																							13,614,000	21,776,000	258,000	7,006,000	0	0	282,000	992,000	0	0	13,074,000	13,778,000	0	0	0	0	0	0	7,070,000	15,076,000	258,000	6,872,000	0	0	282,000	985,000	0	0	6,530,000	7,219,000	0	0	0	0	0	0
Total Contracts																																																							6	31	2	20	0	0	1	5	0	0	3	6	0	0	0	0	0	0	6	31	2	20	0	0	1	5	0	0	3	6	0	0	0	0	0	0
Method used to account for interest on TDRs [Abstract]
Number of Contracts	106	77	79	57	5	8	12	6	3	1	7	5	0	0	0	0	0	0
Accrual Status	51,230,000	40,424,000	30,062,000	22,820,000	11,035,000	11,962,000	4,296,000	2,333,000	462,000	140,000	5,375,000	3,169,000	0	0	0	0	0	0
Number of Contracts	35	38	17	25	4	1	6	6	2	2	5	4	0	0	1	0	0	0
Non-Accrual Status	12,574,000	19,351,000	5,131,000	11,537,000	2,390,000	388,000	1,361,000	1,931,000	272,000	332,000	3,320,000	5,163,000	0	0	100,000	0	0	0
Total Number of Contracts	141	115	96	82	9	9	18	12	5	3	12	9	0	0	1	0	0	0
Total Modifications	63,804,000	59,775,000	35,193,000	34,357,000	13,425,000	12,350,000	5,657,000	4,264,000	734,000	472,000	8,695,000	8,332,000	0	0	100,000	0	0	0
Loans restructured using A note and B note workout structures	$ 2,038,000	$ 1,505,000