Loans (Past Due Loans And Nonaccrual Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due Still Accruing, Subtotal	$ 3,202	$ 475	$ 1,586
60-89 Days Past Due Still Accruing, Subtotal		191	465
Greater Than 90 Days Still Accruing, Subtotal	91		225
Nonaccrual loans	5,922	7,361	9,631
Total Past Due and Nonaccrual, Subtotal	9,215	8,027	11,907
Total Current, Subtotal	650,892	640,538	625,048
Notes Receivable Net	660,107	648,565	636,955
Less: Unearned origination fee, net of origination costs	(3,257)	(3,003)	(2,825)
Total	656,850	645,562	634,130
Risk Code 1 - Excellent [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current, Subtotal	1,394	1,115	1,429
Notes Receivable Net	1,394	1,115	1,429
Risk Code 2 - Good [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Current, Subtotal	125,627	121,781	134,375
Notes Receivable Net	125,627	121,781	134,375
Risk Code 3 - Satisfactory [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due Still Accruing, Subtotal	111
Total Past Due and Nonaccrual, Subtotal	111
Total Current, Subtotal	494,593	477,074	444,218
Notes Receivable Net	494,704	477,074	444,218
Risk Code 4 - Watch [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due Still Accruing, Subtotal	3,037	387	99
60-89 Days Past Due Still Accruing, Subtotal		170	22
Total Past Due and Nonaccrual, Subtotal	3,037	557	121
Total Current, Subtotal	7,530	13,654	15,630
Notes Receivable Net	10,567	14,211	15,751
Risk Code 5 - Special Mention [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due Still Accruing, Subtotal		86	240
60-89 Days Past Due Still Accruing, Subtotal			443
Greater Than 90 Days Still Accruing, Subtotal			225
Nonaccrual loans	148	170
Total Past Due and Nonaccrual, Subtotal	148	256	908
Total Current, Subtotal	13,016	13,118	13,682
Notes Receivable Net	13,164	13,374	14,590
Risk Code 6 - Substandard [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due Still Accruing, Subtotal	54		1,247
60-89 Days Past Due Still Accruing, Subtotal		21
Greater Than 90 Days Still Accruing, Subtotal	91
Nonaccrual loans	5,179	6,076	9,163
Total Past Due and Nonaccrual, Subtotal	5,324	6,097	10,410
Total Current, Subtotal	8,732	13,798	15,713
Notes Receivable Net	14,056	19,895	26,123
Risk Code 7 - Doubtful [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due Still Accruing, Subtotal		2
Nonaccrual loans	595	1,115	468
Total Past Due and Nonaccrual, Subtotal	595	1,117	468
Total Current, Subtotal		(2)	1
Notes Receivable Net	$ 595	$ 1,115	$ 469