Fair Value of Financial Instruments (Quantitative Information about Level 3 Fair Value Measurements) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Income approach		Income approach
Commercial mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Appraisal of collateral (1)	[1]	Appraisal of collateral (1)	[1]
Unobservable Inputs	Disposal costs (2)	[2]	Disposal costs (2)	[2]
Level 3 [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans Fair Value Disclosure	3,487		3,611
Level 3 [Member] | Commercial mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Loans Fair Value Disclosure	2,538		38	[3]
Appraisale Adjustment [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Inputs	Appraisal adj.		Appraisal adj.
Disposal Costs [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unobservable Inputs	Disposal costs		Disposal costs
Minimum [Member] | Appraisale Adjustment [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(40.00%)		(40.00%)
Minimum [Member] | Disposal Costs [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(10.00%)		(10.00%)
Minimum [Member] | Disposal Costs [Member] | Commercial mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(7.00%)
Maximum [Member] | Appraisale Adjustment [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	0.00%		0.00%
Maximum [Member] | Disposal Costs [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(2.00%)		(2.00%)
Maximum [Member] | Disposal Costs [Member] | Commercial mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(5.00%)
Weighted Average [Member] | Appraisale Adjustment [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(19.00%)		(19.00%)
Weighted Average [Member] | Disposal Costs [Member] | Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(7.00%)		(7.00%)
Weighted Average [Member] | Disposal Costs [Member] | Commercial mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount Rate	(5.00%)		(7.00%)

[1] Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various level 3 inputs which are not identifiable.

[2] Appraisals may be adjusted by management for qualitative factors and disposal costs. The range and weighted average of disposal costs are presented as a percent of the appraisal.

[3] * As of December 31, 2011 there is only 1 impaired commercial mortgage loan.